SAN DIEGO -- Third baseman Chase Headley was out of the Padres' lineup Wednesday with what manager Bud Black termed a mild right biceps strain.
Headley, who is hitting .160 through 50 at-bats this season, suffered the strain hitting in the batting cage before Tuesday's game against the Rockies.
"It bothered him as the day went on and bothered him after the game and then again this morning," Black said. "Hopefully he responds well to treatment and gets back out there."
Alexi Amarista made the start at third base against the Rockies on Wednesday night.
When Headley returns to the lineup, Black is hoping to see more production. The same could be said for Headley.
"There's no doubt he's got to start getting his good at-bats," Black said.
Durability has been one of Headley's biggest strengths during his time in San Diego. He has played in 141 or more games in four of the past five seasons.
"It's something I try to take pride in. I have been fortunate to avoid the big injury, but I would also like to think the way I take care of my body and prepare in the offseason and how I maintain my body in-season has something to do with that as well," Headley said at the end of Spring Training.
"There's something to be said for the guys who run out there when they don't feel 100 percent and still give everything they have."