Sons of Sam Horn: Minor League Defense - Sons of Sam Horn

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Minor League Defense

#1 User is offline   Hairps 

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Posted 20 November 2006 - 12:38 PM

In the next few days, Jeff Sackmann, creator of MinorLeagueSplits.com, is expected to release an analysis of minor league defense, the first publicly-available look at defense using batted-ball data for minor league players to date. The system used is modeled after David Gassko's Range.

The complete data set should be made available soon. In the meantime, here are the full results for last year's Red Sox minor leaguers (defensive positions 4-9):

POS-IP: Number of Innings Played at Position.
POS-PL: Number of Plays Made.
POS +/-: Number of Plays Made Above/Below Average.
POS/150: +/- Over 150 Games.

MINIMUM REQUIREMENTS: 175 Innings Played at Position.

INFIELDERS
Last Team Lev 2B-IP 2B-PL 2B-+- 2B/150 3B-IP 3B-PL 3B-+- 3B/150 SS-IP SS-PL SS-+- SS/150
Bacani PorEL AA 916.3 198 -27 -40.3
Chambers LowNYP SS 402.7 120 -9 -32.6
Chiang GrsGCL RK 217.7 61 2 15.4
Diaz GrsGCL RK 275.7 96 11 54.6
Durrington PawIL AAA 242 53 -5 -30.7 473 88 -12 -35.2
Farkes LowNYP SS 294.3 63 -4 -22.6
Granadillo GrvSAL A 877.7 224 27 41.6
Harris PawIL AAA 182.7 49 5 35.8
Jeroloman WilCAR A+ 204.7 66 10 65.4
Jimenez LowNYP SS 176.7 49 8 62.9
Khoury LowNYP SS 308.7 108 3 13.1
Lara GrvSAL A 871.7 267 3 5.1
Lowrie WilCAR A+ 777.7 230 -4 -7.3
Machado PawIL AAA 384 69 -23 -83.7 507.7 110 -32 -86.8
Mercurio GrvSAL A 215.7 51 -6 -40.8
Natale GrvSAL A 237 61 -2 -12.6
Natale WilCAR A+ 504 117 -21 -56.6
Nye PawIL AAA 333 87 16 66.3
Pedroia PawIL AAA 278 76 9 42.7 638.7 184 5 9.6
Pinckney WilCAR A+ 914.3 169 -11 -16.3
Ramos GrvSAL A 528 150 9 23.4
Ramos WilCAR A+ 241.3 73 7 38.4
Segovia LowNYP SS 196.7 57 -6 -43.7 293 93 -6 -30.7
Spann PorEL AA 823.3 156 -6 -10.0
Suarez WilCAR A+ 268.7 66 -7 -38.4 400.3 116 -4 -15.4
Vasquez GrsGCL RK 216.3 73 15 92.7
Wilson PawIL AAA 350.3 76 2 6.5
Borowiak PorEL AA 759 201 2 3.1
De Renne PorEL AA 300 78 0 -3.4


OUTFIELDERS
Last Team Lev LF-IP LF-PL LF-+- LF/150 CF-IP CF-PL CF-+- CF/150 RF-IP RF-PL RF-+- RF/150
Allen PawIL AAA 240 58 2 8.6
Arias WilCAR A+ 210.3 43 -3 -21
Bell GrvSAL A 260.7 46 -5 -29.6
Bell LowNYP SS 184.7 43 10 75.6
Calloway PawIL AAA 382.3 89 10 34.4
Corsaletti WilCAR A+
Daeges LowNYP SS 414.3 55 -8 -27.2
De Renne PorEL AA
Durbin PorEL AA 595.7 125 8 18.6
Durrington PawIL AAA 176.3 39 2 18.7
Ellsbury PorEL AA 402 129 19 64.2
Ellsbury WilCAR A+ 512 162 25 64.9
Engel LowNYP SS 494.3 100 -3 -10.1
Fernandez-Oliva GrsGCL RK 356 53 -5 -21.4
Hall GrvSAL A 258.3 52 8 43.4
Hall WilCAR A+ 568.7 135 9 22.5
Johnson GrvSAL A 181.3 36 -6 -50.4 304.7 68 8 33.4
Johnson WilCAR A+ 279.7 65 3 15.8
Minges PorEL AA 198.3 48 9 62 248 72 4 23
Minges PawIL AAA 286.7 76 9 40.2
Moss PorEL AA 1106 223 -12 -14.9
Murphy PorEL AA 357.7 93 -4 -18
Murphy PawIL AAA 533.7 132 -19 -48.
Place GrsGCL RK 241 72 10 58
Pritz WilCAR A+ 592 170 11 25.4
Smyth LowNYP SS 234.3 41 5 29.8
Soto GrvSAL A 526 96 -8 -21.5
Stern PawIL AAA 398 123 10 34.7 256 67 7 35.6
Turner GrvSAL A 769 116 -14 -24.7
Van Der Bosch PorEL AA 266 48 -4 -21.1
Yema GrvSAL A 868.7 209 4 6.4

NOTES: Not yet park-adjusted. Not yet converted to [/tr] Daeges LowNYP SS 414.3 55 -8 -27.2 De Renne PorEL AA Durbin PorEL AA 595.7 125 8 18.6 Durrington PawIL AAA 176.3 39 2 18.7 Ellsbury PorEL AA 402 129 19 64.2 Ellsbury WilCAR A+ 512 162 25 64.9 Engel LowNYP SS 494.3 100 -3 -10.1 Fernandez-Oliva GrsGCL RK 356 53 -5 -21.4 Hall GrvSAL A 258.3 52 8 43.4 Hall WilCAR A+ 568.7 135 9 22.5 Johnson GrvSAL A 181.3 36 -6 -50.4 304.7 68 8 33.4 Johnson WilCAR A+ 279.7 65 3 15.8 Minges PorEL AA 198.3 48 9 62 248 72 4 23 Minges PawIL AAA 286.7 76 9 40.2 Moss PorEL AA 1106 223 -12 -14.9 Murphy PorEL AA 357.7 93 -4 -18 Murphy PawIL AAA 533.7 132 -19 -48. Place GrsGCL RK 241 72 10 58 Pritz WilCAR A+ 592 170 11 25.4 Smyth LowNYP SS 234.3 41 5 29.8 Soto GrvSAL A 526 96 -8 -21.5 Stern PawIL AAA 398 123 10 34.7 256 67 7 35.6 Turner GrvSAL A 769 116 -14 -24.7 Van Der Bosch PorEL AA 266 48 -4 -21.1 Yema GrvSAL A 868.7 209 4 6.4

NOTES: Not yet park-adjusted. Not yet converted to runs.

This post has been edited by Hairps: 20 November 2006 - 12:40 PM


#2 User is offline   finnVT 

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Posted 20 November 2006 - 12:54 PM

Wow, fantastic. Is there a back of the envelope conversion between # plays and # runs?

Kind of amazing how bad Machado looks. Nice that Ellsbury and Place both look so good in CF. And promising for Pedroia, too.

#3 User is offline   plnii 

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Posted 20 November 2006 - 01:03 PM

finnVT, on Nov 20 2006, 01:54 PM, said:

Wow, fantastic.  Is there a back of the envelope conversion between # plays and # runs?

Kind of amazing how bad Machado looks.  Nice that Ellsbury and Place both look so good in CF.  And promising for Pedroia, too.
<{POST_SNAPBACK}>


The difference for Pedroia from SS (9.6) to 2B (42.7) was also interesting. Ellsbury has the highest positive differential for any of the high-minors guys (~64).

#4 User is online   underhandtofirst 

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Posted 20 November 2006 - 01:03 PM

Can these values be compared to the 2005 MLB numbers from the article you linked to or are these Runs above average comparable only to minor league players at their level? Is there some sort of MLB equivalent translation?

Machado didnt grade out very well in AAA. Ouch.

Murphy was below average in AA and much worse in AAA if I read these numbers correctly, I thought he was supposed to be a pretty good fielder.

I was interested to see Natale because of his rep as all bat no glove. These numbers support that claim unfortunately
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#5 User is offline   PedroKsBambino 

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Posted 20 November 2006 - 01:10 PM

Jacoby Ellsbury defense = vintage Andruw Jones defense? I too am curious about how one would convert those numbers.

Awesome work and appreciate seeing the numbers.
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#6 User is offline   plnii 

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Posted 20 November 2006 - 01:15 PM

underhandtofirst, on Nov 20 2006, 02:03 PM, said:

Can these values be compared to the 2005 MLB numbers from the article you linked to or are these Runs above average comparable only to minor league players at their level?  Is there some sort of MLB equivalent translation?

Machado didnt grade out very well in AAA.  Ouch.

Murphy was below average in AA and much worse in AAA if I read these numbers correctly, I thought he was supposed to be a pretty good fielder.

I was interested to see Natale because of his rep as all bat no glove.  These numbers support that claim unfortunately
<{POST_SNAPBACK}>


Regarding Murphy, he's something of a mystery to me- the times I've seen him play or listened on the radio, he's made some bad plays...bad routes, just missed catches, etc. But overall people say good things about his defense. My guess is that people overrate him because he has a good arm.

Given that the Sox traded for a guy (Crisp) who is fast but can't throw (after having a similar CF in Damon), I figure that they have studied this enough to conclude that an outfield arm means very little in terms of overall defense (at least at CF).

This post has been edited by plnii: 20 November 2006 - 01:56 PM


#7 User is offline   Worst Trade Evah 

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Posted 20 November 2006 - 02:31 PM

Eye-popping numbers for Ellsbury. With that level of defense, how much does Ellsbury need to hit to be better than Crisp? Will Ellsbury be ready in 2007?

Are Gassko's fielding numbers available for recent seasons? I don't see it on his blog. What's the difference between that and the BP numbers? How about Bill James style range numbers, following his chapter in the Dewan book?

This post has been edited by Worst Trade Evah: 20 November 2006 - 02:33 PM

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#8 User is offline   bowiac 

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Posted 20 November 2006 - 02:49 PM

Worst Trade Evah, on Nov 20 2006, 02:31 PM, said:

Eye-popping numbers for Ellsbury. With that level of defense, how much does Ellsbury need to hit to be better than Crisp? Will Ellsbury be ready in 2007?
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If Crisp hits like he did in 2005, that's about 92 runs he creates with his bat.
If Ellsbury hits like Crisp did in 2006(ie not very well), then that's about 65 runs he creates with his bat.

So Crisp is 27 runs ahead offensively. If Crisp's UZR of -14 runs holds up, then that drops the gap to 13 runs.

Thus if Ellsbury is at least 13 runs better than average defensively, and can hit .264/.317/.385, then he's a better player than Crisp is in CF.

However, if Ellsbury's +64.9 plays / 150 pace keeps up in the majors(unlikely), then it's not close between them. 65 additional plays made in the outfield translates to something like 39 runs I believe. If that holds up, then Ellsbury could hit like Dontrelle Willis (.172/.243/.344) and still be 16 runs better. He would need to hit like Josh Beckett did in 2005(.153/.239/.254) to make the two comparable.

More or less, with that level of defense, you don't need to hit. I'm gonna go out on a limb and say that Ellsbury won't be 65 plays better than average defensively in the majors.

This post has been edited by bowiac: 20 November 2006 - 02:50 PM


#9 User is online   underhandtofirst 

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Posted 20 November 2006 - 03:08 PM

bowiac, on Nov 20 2006, 02:49 PM, said:

More or less, with that level of defense, you don't need to hit. I'm gonna go out on a limb and say that Ellsbury won't be 65 plays better than average defensively in the majors.
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The more I think about it the number for Jacoby just doesnt seem right. Over 150 games 65 extra plays means 1 play every 2.3 games (or .43 per game). Last year Carlos Beltran had 372 total chances (357 po, 13 a) in 136 games for an average of 2.73 per game. Coco Crisp had 250 chances in 103 games for an average of 2.43 per game. Multiply that out to 150 games for each (409.5 and 364.5) that's a difference of 45 plays. Ellsbury would be 50% better than the difference between Crisp and Beltran at least in terms of plays made. Wow.

That's probably oversimplifying it because I didnt make any adjustments for FB vs GB staffs, etc.
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Listening to the Boston Sports Guy tell me Papi's stance is the problem was like hearing Carl Spackler tell Tiger Woods his weight transfer is way off. - BU1995Hockey in What's wrong with Papi 4/12/08

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#10 User is offline   Hairps 

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Posted 20 November 2006 - 03:10 PM

Quote

Is there a back of the envelope conversion between # plays and # runs?

Back of the envelope? For some reason I've always used DefensivePlays*.6=Runs. I have no real recollection as to why, though.

So, 15 Plays Above Average*.6 = 9 Runs. Or something.

Quote

Can these values be compared to the 2005 MLB numbers from the article you linked to or are these Runs above average comparable only to minor league players at their level?

No, only to minor league players at their level.

Quote

Is there some sort of MLB equivalent translation?

Not yet.

#11 User is offline   Rudy Pemberton 

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Posted 20 November 2006 - 03:19 PM

But, you have to remember that Ellsbury's # is being compared to his peers, many of whom will never sniff the majors. So, I'm not so sure you can look at it the same way as you would two major leaguers. Would be interesting to see how Ellsbury compares to other top CF prospects in the minors, right?

#12 User is offline   bowiac 

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Posted 20 November 2006 - 03:21 PM

Hairps, on Nov 20 2006, 03:10 PM, said:

Back of the envelope? For some reason I've always used DefensivePlays*.6=Runs. I have no real recollection as to why, though.
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That's what I had in my mind as well when I ran the Crisp vs. Ellsbury comps, and I don't really remember where it came from either.

#13 User is offline   Hairps 

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Posted 20 November 2006 - 03:42 PM

Quote

Would be interesting to see how Ellsbury compares to other top CF prospects in the minors, right?

Lastings Milledge was +5 in CF over 464 Innings Played in Norfolk (AAA).

#14 User is offline   Rudy Pemberton 

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Posted 20 November 2006 - 03:49 PM

Nice, that is encouraging. I would have to imagine that park effects and the skills of a team's pitchers are fairly large factors here, no? Do we know how the other CF's on Portland played, or how opponents did (just in games vs. Ellsbury)?

These numbers are so strong (and they support what we've heard from scouts) that one can't help but be impressed, frankly.

This post has been edited by Rudy Pemberton: 20 November 2006 - 03:53 PM


#15 User is offline   plnii 

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Posted 20 November 2006 - 04:06 PM

Rudy Pemberton, on Nov 20 2006, 04:49 PM, said:

Nice, that is encouraging. I would have to imagine that park effects and the skills of a team's pitchers are fairly large factors here, no? Do we know how the other CF's on Portland played, or how opponents did (just in games vs. Ellsbury)?

These numbers are so strong (and they support what we've heard from scouts) that one can't help but be impressed, frankly.
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Murphy was -18 at Portland, so we have that as a comparison.

Pritz was +25 at Carolina- I have no idea what his defensive rep is.

Edit - Soxprospects calls Pritz "Speedy centerfielder with great range" so +25 is consistent with that.

This post has been edited by plnii: 20 November 2006 - 04:16 PM


#16 User is offline   xjack 

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Posted 20 November 2006 - 04:10 PM

Fascinating that Murphy is this bad. Defense was supposed to be one of his calling cards, wasn't it?
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#17 User is offline   PedroKsBambino 

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Posted 20 November 2006 - 04:12 PM

Stern was +34 in PAW. That gives us a bit of an idea of what that looks like, as we saw Stern for a while between the early season and WBC though not enough to really have a good sample for him at the MLB level.

Of course, that's an additional level away from Ellsbury but it's something.

What we need is a CF who was called up in 2006 and had roughly half the season in the minors and the majors...then we can look at metrics from both. Chris Young, maybe, but he missed a bunch of time early-season in the minors.

This post has been edited by PedroKsBambino: 20 November 2006 - 04:13 PM

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Posted 20 November 2006 - 04:18 PM

xjack, on Nov 20 2006, 04:10 PM, said:

Fascinating that Murphy is this bad. Defense was supposed to be one of his calling cards, wasn't it?
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Murphy botched a couple of balls during his stay in Boston. He didn't look very good in Fenway despite being named the 2005 Red Sox minor league defensive player of the year (an award Ellsbury won this year). His reads looked solid but his range was so/so. If I was forced to give an evaluation I would say he's average at a corner and below-average/passable in center. Ellsbury's on the other hand, his stats back-up the anecdotal evidence which ranges from pretty good to f@#$*ng unbelievable.

This post has been edited by amarshal2: 20 November 2006 - 04:22 PM


#19 User is offline   Eric Van 

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Posted 20 November 2006 - 06:08 PM

Hairps, on Nov 20 2006, 03:10 PM, said:

Back of the envelope? For some reason I've always used DefensivePlays*.6=Runs. I have no real recollection as to why, though.

It's 0.8, not 0.6. A little bit more for an OF (that value is for a 1B).

You can get this from linear weights or from a formula like Runs Created or my Contextual Runs. For instance, p. 26 of Tango's The Book has a single as .475 runs and an out in play as -.299.

These minor league numbers clearly show much more variance than MLB numbers, since the latter pool has been selected already for a higher level of minimal competence.

In another year we should have a set of formulas to translate these numbers from level to level. That will be very interesting.

#20 User is offline   OCD SS 

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Posted 20 November 2006 - 06:20 PM

Rudy Pemberton, on Nov 20 2006, 03:19 PM, said:

But, you have to remember that Ellsbury's # is being compared to his peers, many of whom will never sniff the majors. So, I'm not so sure you can look at it the same way as you would two major leaguers. Would be interesting to see how Ellsbury compares to other top CF prospects in the minors, right?
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Ellsbury looks like the defensive equivalent of a player who puts up a 1.000+ OPS in the minors; he might not continue at that level in the majors, but he's still a good bet to be an excellent major leaguer.
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