I know it has been a while since this, but I noticed something recently while pitching.
While warming up, I focused on leading with hip, and my velocity definitely shot up with no effort.
Through the game, that’s the only thing I really thought about, and speed stayed up.
Then, I got kinda pissed off at a bunch of errors in a row (never yelling at fielders of course, they are not trying to mess up. still frustrating). I found myself moving forward way faster, and my speed spiked up again.
I think that in one day, my speed jumped at least 5 mph, maybe more. For the first time in a while, I actually felt like I was fast.