The graph above plots the platoon splits for each member of the Twins bullpen. OPS against vs. right-handed batters is on the x-axis, so points further to the left are successful against right-handed batters. OPS against vs. left-handed batters is on the y-axis, so points further toward the bottom are successful against left-handed batters. Points closest to the diagonal line are equally effective (or ineffective) against both types of batters.
A few takeaways:
- Caleb Thielbar is on fire. Among relievers, he is at the 88th percentile for strikeout rate 98th percentile for exit velocity. Does that call for a promotion to a bigger role where he faces more right-handed batters? Perhaps. Right-handed batters own an OPS below 0.700 against Thielbar. In fact, his OPS against opposite-sided batters is better than that of Jorge López, who allows a 0.711 OPS to left-handed hitters. And nobody would call López a specialist against right-handed batters.
- The Twins deadline acquisitions, López and Fulmer, are death to righties allowing a 0.471 and 0.438 OPS respectively. Fulmer, however, is an absolute liability against lefties, allowing an 0.830 OPS to opposite-sided hitters. He meets the definition of a specialist.
- Emilio Pagan has insane reverse splits, with righties boasting a debilitating 1.075 OPS against. Pagán has never had significant reverse splits in prior seasons, so that may be an anomaly. But with the way things are going for Pagán, who's to say?
- Jhoan Duran, Trevor Megill, and Griffin Jax all appear to be matchup independent. And Megill's splits so closely mirroring Duran's suggest he deserves to keep getting chances