"Other Braves outfielders have cringed while imagining what it would feel like to collide with Jason Heyward. Nate McLouth experienced it.

The smallest Brave(McLouth) collided with the largest (McLouth) in the eighth inning Wednesday night, and the end result was a two-run, inside-the-park homer for the Diamondbacks and possible concussion for McLouth.

The center fielder still had a severe headache late Thursday afternoon, and manager Bobby Cox said the Braves might have to put McLouth on the 15-day disabled list.

"I'm going to talk to him after a while and see how he's doing," Cox said before the Braves headed to the Phoenix airport Wednesday afternoon for their flight to Minneapolis. "If [he's] not [doing better soon], then we'll have to call somebody up.""