In Chapman's case, it helps that he already has four developed pitches -- a fastball, slider, splitter, and changeup -- but you can still consider two of them untested given that he's never had to use the split or changeup as a reliever. In other words, the pitches might not be as far along as the Reds hope. As a reliever, Chapman threw his fastball 88 percent of the time (98-m.p.h. average velocity), and has shown shaky command with his slider. As for the other two pitches, BrooksBaseball.net says that he's thrown a change-up only three times in the majors. Even though Baker described Chapman's splitter as "nasty," Chapman has thrown it exactly once in the majors. Since the splitter and change-up aren't as sharp, it makes since that he'd be encouraged to limit their usage, but just because Chapman has more pitches than originally anticipated, it doesn't necessarily mean it's a good arsenal, and there's still concern about his ability to throw off-speed pitches to left-handed batters, a huge weakness when facing platoons.