Shane Bieber’s New Old Curve
It’s the beginning of August, and one only one pitcher is on pace for a 6 WAR season. In a normal year, that would be disappointing; there are usually something like four or five of them. In this short year, on the other hand, it’s downright amazing, and I don’t know a better way to say it than that: right now, Shane Bieber is downright amazing.
Through two starts, Bieber is putting up numbers like peak Craig Kimbrel, only he’s doing it as a starter. You’ve seen individual games like this before, so the numbers might not sound completely wild to you, but they’re wild. A 54% strikeout rate and 2% walk rate, a 0 ERA, a -0.36 FIP; that’s all obviously excellent in an abstract sense. To truly understand it, however, you have to take a closer look at Bieber’s stuff. He’s absolutely bullied his way through two straight dominant performances, and there’s no better way to do it than to take a trip through his overpowering secondary stuff. Watch hitters flail, and you can get a better sense of how thoroughly masterful Bieber has been this year.
In 2018 and 2019, Bieber’s calling card was his wipeout slider. He threw it 23% of the time in 2018 and 26% of the time in 2019, and hitters simply couldn’t do anything with it. They whiffed on roughly 43% of their swings against the pitch in both years, often looking foolish:


