"Nate McLouth was able to take batting practice outside Friday without incident as he continues to try to get acclimated to the heat.

McLouth is battling lingering dizziness as a result of the concussion he suffered on June 9 in Arizona in a collision with Jason Heyward. He had to come off the field Tuesday when he first tried to take batting practice outdoors.

Of course, temperatures Friday afternoon were cooler, and it was a pleasant 79 degrees at first pitch.

"I feel fine if I'm inside, just hanging out," said McLouth, who said he is no longer having headaches. "It's just when I get outside and get really heated up that I start feeling dizziness and light-headedness."

McLouth said if he continues to adjust, he might be able to start a rehabilitation assignment "hopefully within the next week or so."

"It's all really how I respond to the heat," McLouth said."