SAN DIEGO -- D-backs left-hander Wade Miley, who allowed four runs on nine hits in five innings while experiencing a drop in velocity on Friday, watched video of the start on Saturday to try to understand why he struggled.
"Mechanics weren't too bad," Miley said. "Might have been rushing, flying open a little bit. Nothing major."
When a pitcher rushes and opens his lead shoulder prematurely, he can end up pushing the ball rather than getting on top of it. That can reduce not only control, but also velocity.
"A lot, because you've got no lower half," Miley said of the result of poor mechanics. "Spinning off means you have no power below. So it's kind of a positive in a way. I just have to get in the bullpen and work on some things."
Among the things he will work on is staying back and staying over the rubber.
Miley will throw his normal between-starts bullpen session on Monday in Los Angeles, and he is slated to start Wednesday's series finale against the Dodgers.
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.