"It's hard to tell because it hasn't even been 24 hours yet," McLouth said about the possibility of going on the disabled list. "It's not my choice, but if I'm still feeling this way tomorrow, then that would be a little different."
McLouth began feeling the headache after flipping over Heyward and slamming his upper back and head into the outfield grass during Wednesday night's eighth inning. Neither outfielder called for the ball as they raced into right-center field to grab a Gerardo Parra fly ball that fell to the ground and resulted in a game-winning, inside-the-park home run.
"It's a ball that neither one could call because you don't know if you can get it or not," Braves manager Bobby Cox said. "It can happen like that when the ball is hit to just the right spot."
The Braves still haven't labeled McLouth's condition as a concussion. But even with the symptoms that he has, Cox knows that his center fielder could be sidelined for at least a week.
"Typically, it's three-to-seven days," Cox said. "I don't know what the term is. They just said a contusion of the head."
Doctors have recently shown much more caution when prescribing treatment for athletes who incur some sort of head trauma. The National Football League has implemented stricter rules about when players are permitted to return from concussions.
"Recently, people have been very cautious with head injuries, especially in the NFL," McLouth said. "I guess we'll find out."
Taking precautionary measures in the event that the collision caused a concussion, Braves trainer Jeff Porter awoke McLouth at 4 a.m MST and then repeatedly kept tabs on him throughout Thursday's game.
"I think that was a pulse check to see if I was still alive," McLouth said.
While clipping McLouth's legs with his own, Heyward suffered a bruised right shin. The Braves' 20-year-old phenom wore a padded bandage around the affected region while recording a pair of RBI singles during Thursday's win.