Headley had started 42 of the Padres' first 43 games. The switch-hitter is batting .245 with five homers and 20 RBIs.
Black said Headley might be available to pinch-hit.
"We want to let this calm down a little," Black said.
Headley was 1-for-4 with a double in Monday's 4-3 loss at St. Louis.