Jered Weaver was very efficient at keeping batters off the bases last season. His OBP against of .267 was the second best among all major league starters throwing a minimum 500 plate appearances. Weaver's off speed pitches, specifically his slider, were a big part of his success.
Weaver's slider had more horizontal movement than any other right-handed major league slider last season. It averaged 9.4 feet per second of right to left movement when crossing the plate, more than a half a foot of movement more than the next slider on the list.
When Weaver's slider averaged more than 8 feet per second of movement last year, batter's managed to hit only .207 and slug .269. When it's movement dropped below 8 feet, batter's hit .250 and slugged .500.