"He's undergoing tests on that right now," Shula said. "It's not life threatening or anything like that, but he's being held out until he gets those tests done."
"A day or so ago, it was something that, I guess his heart was beating fast and they had him checked out," Shula said.
Thursday's practiced was termed "pretty good" from the head coach, aside from some slowness on offense in certain drills.
The squad will go to Bryant-Denny Stadium on Friday for its mock game, where they will go over everything involved in the pre-game routine and some scripted in-game situations.
"We go from what we do in the locker room pre-game, how we get on the field, stretch, all those little drills," Shula said. "It's going to be real light tempo and there's going to be a lot of scripted situations. We kind of inform the players ahead of time to listen to what the situation is because there are a lot of things in a game that come up unexpectedly."
On Saturday the team will have the day off.
"They're a little bit tired, especially with school coming," Shula said. "We've backed off a little bit as far as conditioning. We didn't a little bit yesterday. We didn't do any today."
Defensive back Roman Harper and Ramzee Robinson were back into some practice action off of the orange "injured" jersey list. Robinson might go full speed at practice as early as Sunday, but he is still listed as questionable for the first game. Back-up cornerback Eric Gray is also listed as questionable for the opener against MTSU.
Roman Harper said he felt good returning to the field after nursing a nagging hamstring injury.
Tight end Travis McCall suffered heat exhaustion, but should be fine, Shula said.
Antoine Caldwell, who returned to practice yesterday, looked "back to his normal self today," Shula said, "especially at the end of practice which makes you feel good because he got through the whole practice and still was moving pretty good."
"Mark Sanders has got to be ready to play right guard, left guard and right tackle," Shula said. "Right now he would be at the right guard and Marlon Davis is still getting a lot of work at right guard."
Shula said his depth chart is near completion "with some flexibility" and would be released soon.
"We'll give you that pretty soon, but it's a two-deep depth chart that's been released for the media and the fans. That changes a lot. There's some guys that might not ever show up there that are in the game a lot," he said.
"Whatever the athletic director—talk with him and communicate with him. I don't know what he said and what he hasn't said," Shula said.
Asked if he would give the game a "thumbs up" he said, "To play Florida State? If we play them, yeah. I'd be excited to play anybody."