Some notes and speculation on post-Katz lab Clevinger, based on pitch data from his first start:
His velocity is up. After averaging 95.5mph in 2019, the fastball was down to 93.6mph last year. Against Houston, it was back up to 94.7mph and might still gain a tick or two.
The slider has ticked up slightly from 79.9mph last year to 80.5mph. It averaged 80.7mph in 2019.
The most interesting thing? It's possible he's changed the shape of his fastball to more closely resemble what it was back then too:
2019 Fastball: 12.2in drop, 5.3in break
2022 Fastball: 14.2in drop, 8.7in break
2023 Fastball: 11.9in drop, 5.7in break
With the old shape, the combo was very effective and both pitches had a negative run value. Last year, the fastball was a neutral 0 RV and the slider was his worst pitch (6 RV). Katz is a big fastball/slider tunneling guy, and I suspect the 2019/2023 fastball shape tunnels better with the slider (which hasn’t actually changed too much), making both more effective (negative RV on both through the obviously small 2023 sample).
Remains to be seen how it holds up and how/if/when they work in his other pitches, but the numbers stood out to me and I assume this was at least one of the potential fixes the team thought they could make.
Another interesting tidbit: 2018-9 Clevinger was a much faster worker, averaging the now standard pace of ~15 seconds between pitches. Last year, he was at 19 seconds. Maybe that was impacted by the TJ/knee recovery, but it’ll be interesting to see if he’s also a “helped by the pitch clock” candidate.