The Curious Case of the Curveball in the Nighttime
Monday night, Michael Wacha made a cathartic first start with the Mets. Over five solid innings, he struck out four while allowing only one run on a Mitch Moreland solo shot. He walked away with the win, his first in more than a year, and gave Mets fans hope that they might cheat the injury gods and assemble an acceptable rotation. But wait! Michael Wacha was last seen being terrible. It’s time to do some digging. The game is afoot!
We start this investigation, like so many others of sudden pitching competence, with the fastball. But alas, there’s nothing to be gleaned from it. Wacha averaged 94.3 mph on the pitch, a hair higher than last year’s season-long average but only a hair higher than last July’s mark. Allowing for the fact that the switch to Hawkeye might come with some calibration errors, we can rule out a newly lively fastball accounting for the fact that the Red Sox looked flummoxed.
Or can we? Why not spiral deeper, hunt further for fastball clues? His spin rate is up by nearly 150 rpm. Mayhap that’s the culprit. Mayhap indeed — but in my opinion, it’s not likely. Spin is one of the things to be most skeptical about in the new system. Perhaps skeptical is the wrong word; maybe we should be skeptical of the old measurements. The Hawkeye system measures spin directly with high-speed cameras, while the old radar-based system imputed spin from other factors. The point is, spin is going to be a tricky thing to tackle for a good while. Read the rest of this entry »