Hoping to return from Tommy John elbow surgery around the first week of August, Medlen was cleared to begin facing live hitters last week. But like many other pitchers recovering from this surgery, he experienced a setback while throwing a bullpen session at Turner Field on Tuesday afternoon.
"He cut his bullpen back a little bit, but there were no red flags," manager Fredi Gonzalez said. "It's just something that happens. Nobody was really worried about it."
Heyward, who is on the disabled list with a sore right shoulder, and McLouth, who is on the disabled list with a strained left oblique muscle, are both eligible to come off the DL before the Braves open a three-game series against the Marlins on Tuesday night.
But Gonzalez said Sunday afternoon that he did not believe either of these outfielders had even started taking batting practice yet. Both will almost certainly have to play a few Minor League games before being activated.
For now, Gonzalez wants Heyward and McLouth to continue receiving all of their treatment at ESPN's Wide World of Sports complex in Lake Buena Vista, Fla.
"They'll join us when they start getting closer to baseball activity or start getting closer to needing to go on a rehab assignment," Gonzalez said.