Headley tried to reach out to Leon late Monday, but wasn't able to. He passed along a message to the catcher, though.
"We called over there while I was with [head trainer Todd Hutcheson] to try and get a hold of him," Headley said. "Hutch kept trying. Hopefully they passed along the message. It's such an unfortunate thing, but it wasn't a dirty play."
Headley collided with Leon as the catcher blocked the plate in the Padres' three-run fourth inning of an 8-5 loss to the Nationals. Headley scored on a two-run single by Orlando Hudson, but only after bowling over Leon, who had to be helped from the field.
"Coming in, you intend to slide until there's nowhere to go," Headley said. "He really left me nowhere to go. You hope that he's going to be OK. It's a bummer to have that happen in your debut."