"There's not a whole lot you can do until you get to the doctor and have him check you out. Until then, there's no sense worrying about it," Vincent said.
Vincent said he was dealing with a bit of a sore elbow last month, and the fallout might have led him to drop his arm angle. That could have led to the shoulder fatigue, he said.
"I really don't know if that put more stress on the shoulder or not," Vincent said. "But me and [pitching coach Darren Balsley] watched video and the arm slot looked a little lower. We tried to get it back up, but we couldn't."
After posting a 1.50 ERA in April, Vincent's ERA ballooned to 4.50 in May and then 30.38 in four outings in June before he landed on the disabled list on Sunday, retroactive to Thursday.
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.