Since 2009, the following three pitchers seem to provide the best-case (but still reasonable) scenarios from which we could then further calibrate our expectations:
Edinson Volquez:
SURGERY: 8/3/2009
FIRST REHAB START: 6/23/2010
DAYS BTWN: 324
NEXT MLB START: 7/17/2010
DAYS BTWN: 348
Jordan Zimmerman:
SURGERY: 8/19/2009
FIRST REHAB START: 7/2/2010
DAYS BTWN: 317
NEXT MLB START: 8/26/2010
DAYS BTWN: 372
Stephen Strasburg:
SURGERY: 9/3/2010
FIRST REHAB START: 8/7/2011
DAYS BTWN: 338
NEXT START: 9/6/2011
DAYS BTWN: 368
Let’s set those as the optimistic-but-reasonable parameters for Matsuzaka’s return. So, going from Dice-K's 6/10/2011 surgery date...
FIRST MINOR LEAGUE REHAB START:
USING ZIMMERMAN’S REHAB TIMELINE (317 days): April 22, 2012
USING VOLQUEZ’S REHAB TIMELINE (324 days): April 29, 2012
USING STRASBURG’S REHAB TIMELINE (338 days): May 13, 2012
MLB RETURN:
USING VOLQUEZ’S MLB TIMELINE (348 days): May 23, 2012
USING STRASBURG’S MLB TIMELINE (368 days): June 12, 2012
USING ZIMMERMAN’S MLB TIMELINE (372 days): June 16, 2012
And what to reasonably expect upon Matsuzaka's return? Well, I'm suspicious of pitcher projections in general, even when not coming off of an injury, so I'll just post the data for how Volquez, Zimmerman, and Strasburg fared when they got back. Hopefully, the data is pretty self-explanatory, but the following should be helpful:
FB VELO: Fastball velocity for BEFORE (average of the two seasons prior to surgery) and AFTER.
COMMAND: K/BB
SWING & MISS: The percentage of pitches at which a batter swung and miss.
H MOVEMENT: Horizontal movement of the pitcher's fastball.
V MOVEMENT: Vertical movement of the pitcher's fastball.
| IP | GS | FIP | FB VELO | COMMAND | SWING & MISS | H MOVEMENT | V MOVEMENT | |
| BEFORE | 5.01 | 93.6 | 1.5 | 24.4 | -5.4 | 8.3 | ||
| RETURN | 62.7 | 12 | 4.00 | 93.8 | 1.9 | 29.9 | -4.3 | 7.8 |
| RETURN+1 | 108.7 | 20 | 5.29 | 93.4 | 1.6 | 25.7 | -3.5 | 7.7 |
| IP | GS | FIP | FB VELO | COMMAND | SWING & MISS | H MOVEMENT | V MOVEMENT | |
| BEFORE | 3.59 | 93.1 | 3.2 | 18.3 | -4.6 | 10.0 | ||
| RETURN | 31 | 7 | 5.85 | 92.2 | 2.7 | 13.1 | -5.5 | 9.5 |
| RETURN+1 | 161.3 | 26 | 3.16 | 93.3 | 4.0 | 16.5 | -5.3 | 8.0 |
| IP | GS | FIP | FB VELO | COMMAND | SWING & MISS | H MOVEMENT | V MOVEMENT | |
| BEFORE | 2.08 | 97.6 | 5.4 | 27.5 | -5.9 | 7.8 | ||
| RETURN | 24 | 5 | 1.28 | 96.0 | 12.0 | 23.2 | -5.5 | 8.9 |
Armed with the above data, project away for what we could reasonably expect from Matsuzaka:
| IP | GS | FIP | FB VELO | COMMAND | SWING & MISS | H MOVEMENT | V MOVEMENT | |
| BEFORE | 4.34 | 91.1 | 1.5 | 17.3 | -6.4 | 8.2 | ||
EDIT: Note that all of the data for Matsuzaka is an average of his brief 2011 season, and his 2010 season.
Edited by Hairps, 20 April 2012 - 12:23 PM.
















