From : http://www.foxsports.com/mlb/just-a-bit-outside/story/jered-weaver-anaheim-abgels-fastball-slow-history-110915
Perhaps Weaver will show up to spring training in 2016 – the final year of his contract – with renewed life on his fastball. One thing is clear, however: if Weaver shows up with an 83 mph fastball and claims full-time starting duties, he will be in rare company. Succeeding long-term with that sort of stuff? Only two recent right-handers have done it. One of them's in the Hall of Fame.