Neville E. Guard-Imagn Images I’ve been playing around with the new FanGraphs Lab tools a lot recently. At first, it was bug testing, but it pretty quickly turned into fun. One minute, you’re making sure that sliders show up correctly. Next minute, you’re wondering about Logan Webb ’s backwards slider. See, Webb throws a big-bending sweeper instead of a gyro slider, but it doesn’t behave at all how you’d expect: It’s good against lefties and bad against righties. In 2025, Webb put up 5.5 WAR, a career-high mark and his fifth straight season of four or more wins. He used his sweeper a lot to get there. Webb was one of the most frequent right-on-left sweeper users in the majors, and also one of the best. Measured by run value added per 100 pitches, he was 11th in baseball among all righties who threw even 100 such sweepers – and he threw 400 of them. He was 15th in whiff rate for good measure. He was as effective as Paul Skenes was in this situation while going to the pitch thre...