In that game, Headley slid feet-first, trying to break-up a double play. On Sunday, he slid feet-first again because, well, that's what he's essentially been instructed to do.
"I don't think I slid headfirst one time last year, after it was made apparent to me that I shouldn't," Headley said.
Headley's incident in March isn't the first time he's injured a finger while sliding.
In August 2011, Headley fractured his left pinkie finger when he hooked it on the second-base bag during a stolen base attempt. He missed over a month of action.
"They basically told me after I broke my pinkie a few years ago that I couldn't slide headfirst," Headley said. "So I've been feet-first since then.
"But I still feel like it's faster and you can avoid more tags going headfirst. For me, the risk-reward isn't there. My primary job isn't to steal bases."
Actually, hitting is. Headley hit a career-best 31 home runs and led the National League with 115 RBIs a year ago. That said, he's always been a proficient baserunner. In 2010, he stole 17 bases. Last season, he stole 17 again.
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.