Jacob Barnes was a right-hander signed to a minor league deal who made the Angels bullpen as a non-roster invitee, and was most effective against left-handed batters in 2020.
He held lefties to just 4-for-24 (.167) with 12 strikeouts, and his strikeout rate against lefties (46.2 percent) was double his K rate against righties (23.1 percent).
Overall, Barnes had a 5.50 ERA in 18 innings, but thanks to solid peripheral numbers — 24 strikeouts against four walks, the best strikeout-to-walk ratio on the team, and only one home run allowed — gave him a 2.25 FIP. Amazingly, the difference between Barnes’ ERA and FIP (3.