MESA, Ariz. -- Jarrod Parker isn't just going through the motions his second time through Tommy John rehab. The A's right-hander is putting into practice lessons he learned the first go-around -- and from former teammate and master commander Bartolo Colon.
"I'm worrying about my delivery and hitting my spots," said Parker, who underwent the surgery a first time in October 2009 and again last March. "I think the first time through, I was a little lax on the command and it was the last thing to come back, so I want to make sure this time I have it right away and there's no hiccup and I can just go in with a solid heater.
Jane Lee is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.