The Change — Velocity Gainers and Losers
Here’s the saddest thing about velocity changes in pitchers: it looks like you’re screwed either way. Velocity is mostly good for results, but Tommy John pitchers both a) threw harder across pitch types when they were healthy and b) showed velocity loss the year they had surgery. So, either way according to Jon Roegele’s research at least, it could be seen as a negative even if you show up as a velocity gainer on our lists today.
On the other hand, it’s probably better to combine velocity loss with things like a drop in zone rate and an inconsistent release point — things that Josh Kalk put into his injury zone work — and not just rely on velocity loss alone.
That said, a tick on the gun is still worth something in run prevention. And so let’s look at which pitchers are happy or hurting on the radar gun.