Do we know for a fact that he is tipping?
After thinking about it for many months and watching him stink yesterday, at this point I kind of just think his stuff crossed a tipping point of effectiveness.
Like, you know how a guy with a fringe fastball can sometimes be good at 91 but gets hammered at 89 and his career is over? The Hyun-Jin Ryu line in the sand. There might be something similar, but less extreme, happening with Berrios.
His 4 seamer has not really lost any velocity or spin since 2016 but is HAS lost effectiveness. Here is the whiff% on his 4S and Sinker since 2017:
4S: 26.2%, 23.7%, 23.9%, 23.5%, 21.5%, 18.9%
Sinker: 13.3%, 15.3%, 12.6%, 18.2%, 14.6%, 11.7%
When you look at a model like Stuff+ it says the 4S is now a below average stuff pitch. It's not that it has gotten worse, it's probably that the league has gotten better, and hitters are therefore better at hitting fastballs like this. He has okay command of the fastball (103 and 104 location+ on the 4S and sinker) but maybe it's not good enough to overcome what is now a below average four seamer. So maybe it's like... his 55 FA is now a 45, effectively?
His curveball still grades out well by Stuff+. In fact, it's basically tied for the best single pitch on the 2022 staff, along with Stripling's CH and Guasman's Split. But Berrios has a close to average 102 Location+ on his curveball while Gausman and Stripling married 109 and 111 Location+ figures to their carrying pitches.
So the picture is:
1. Below average 4S with average-ish command
2. Average sinker with average-ish command
3. Bad changeup?
4. Good (or really good) curveball with average-ish command.
I think it can be hard to live on a good curveball alone, depending on the pitch. It's a bit different from trying to live on a good tight slider. Sometimes even with good command it's hard to land it for strikes, for instance.
Okay, let's look at guys with good curveballs and bad fastballs and try to parse out how they avoid sucking. 115 stuff+ curves with fastballs under 95 stuff+.
Wainwright: 135, 75
He is 32% curveballs, 25% cutters, 28% sinkers. He has mostly abandoned the four seamer.
The cutter gets decent grades still (106 stuff+) but the curveball is simply in a different class.
Kyle Wright: 127, 82 (96 sinker)
He is 34% curveballs, 20% four seamers, 24% sinkers.
His changeup gets a 100 stuff+ and he throws it 15% of the time, which is a difference from Berrios.
His curveball grades out even better than Berrios' but this might be a guy for Berrios to look at.
Morton: 127, 85
Another elite curveball, like Waino and Wright. He is 33% 4S and 38% curves.
Kelly: 122, 85
A bigger arsenal guy. He is 4S, cutter, sinker, change, curve and he throws them all between 13.5% and 29.9% of the time.
Also has better command; a 105 overall Location+ is almost two standard deviations above average.
Kluber: 120, 83
He is cutter, sinker, curve (sometimes called slider).
Musgrove: 120, 82
Has fastball, cutter, slider, curve, and seldom used sinker and change.
JOSE BERRIOS NEEDS A CUTTER.
Kluber is 30%+ cutters.
Musgrove is 20% cutters.
Kluber and Musgrove might be the best comparisons for Berrios if you just look at basic fastball quality and curveball ("slurve") grades. Both of these dudes have developed GOOD cutters. They also have some other tricks, like better changeups, but they don't throw them that much.
Option B would be for Berrios to turn his "slurve" into two distinct breaking pitches. A slider/sweeper and curve.
He might also consider toning down the % of four seamers.
He should be a Sinker/Cutter/Curve/Slider guy.