Zack Wheeler Keeps Quietly Improving
Zack Wheeler signed a big contract before the 2020 season, and if we’re being honest, the Phillies paid for potential. That’s not to say Wheeler wasn’t an effective starter with the Mets, but his career numbers — a 3.77 ERA, a 3.71 FIP, a 22.8% strikeout rate, and an 8.5% walk rate — didn’t scream ace.
His stuff, on the other hand, spoke loudly. An upper-90s fastball and lower-90s slider invite comparisons with Jacob deGrom, and his curveball prevents batters from sitting on a single breaking ball. If you could design a pitcher in a lab — well, fine, you might come up with deGrom or Gerrit Cole. But if you ended up with Wheeler, you’d certainly be happy with your work.
When a pitcher’s results — and again, they were good results — fall short of what you’d expect from their stuff, any stretch of better outcomes feels like a tantalizing glimpse at what a breakthrough might look like. At this point, however, it’s not a glimpse: Wheeler has fully broken out into the ace the Phillies hoped for when they signed him.
Consider this: since leaving the Mets, Wheeler has the 10th-best ERA in baseball. It’s not some fluky sequencing effect, either. He has the eighth-best FIP in the game over that time frame, the 17th-best xFIP, and the 17th-best SIERA, another advanced ERA estimator. He’s done all of that while throwing the third-most innings in the game, behind only Shane Bieber and Aaron Civale. That combination of skill and volume puts him sixth among all starters in WAR over that time frame, in a virtual tie with Cole. Read the rest of this entry »