At the end of the day, the biggest thing we can lean on right now is that every other year of his career to this point he has thrown his FB 50-60% of the time, and this year it is at 37% through four starts (according to Fangraphs, at least). He's also throwing it more slowly than usual, and it has a significantly lower value than in the past. Additionally, according to Brooks Baseball all of his pitches are showing reduced velocity so far, not just his fastball. So that leaves us with what options?
Luckily, we are getting to the point in the season where someone smarter than me over at Baseball America or Baseball Prospectus will do a detailed breakdown of Sale's mechanics and pitch/fx stats, and we should have a pretty good idea of what's going on soon. A quick look at the pitch/fx data by my untrained eye actually shows some good news, which is that movement and release points don't appear to be way out of line with the norms, even if the velocity is. He does seem to be leaving his pitches way up, but I don't know if that's a pitch calling issue or a command problem on his end.
The one conclusion that doesn't appear to be at all supported by the data so far though, is that everything is fine and he is making his normal pitches but getting unlucky results. Strand rate is way down even though BABIP isn't crazy high. Barrel/solid contact rate is doubled, HR/FB rate has skyrocketed, etc.. The good news is that it's still early enough that it could be a bad month, and then he tweaks a few things and crushes it for the rest of the season. If he says he is healthy (a big if, but we have to take him at his word), they should be able to turn it around.
- He is throwing his fastball the same amount, but the velocity/spin is down enough that they are being wrongly classified as sliders
- He is throwing his fastball less because he is trying to protect his shoulder and he identified it as the source of his problems last year
- He is throwing his fastball less because it hurts him, or is injured
- He is throwing his fastball less because he recognizes how ineffective it is, whether due to a change in mechanics or natural decline in performance due to the normal wear and tear on his shoulder
Luckily, we are getting to the point in the season where someone smarter than me over at Baseball America or Baseball Prospectus will do a detailed breakdown of Sale's mechanics and pitch/fx stats, and we should have a pretty good idea of what's going on soon. A quick look at the pitch/fx data by my untrained eye actually shows some good news, which is that movement and release points don't appear to be way out of line with the norms, even if the velocity is. He does seem to be leaving his pitches way up, but I don't know if that's a pitch calling issue or a command problem on his end.
The one conclusion that doesn't appear to be at all supported by the data so far though, is that everything is fine and he is making his normal pitches but getting unlucky results. Strand rate is way down even though BABIP isn't crazy high. Barrel/solid contact rate is doubled, HR/FB rate has skyrocketed, etc.. The good news is that it's still early enough that it could be a bad month, and then he tweaks a few things and crushes it for the rest of the season. If he says he is healthy (a big if, but we have to take him at his word), they should be able to turn it around.