"I had an MRI today," he said. "They are calling it a strained ulnar collateral ligament and a sprained flexor tendon (in the right throwing elbow)."
Krenzel said it happened during the first half of the game against North Carolina State.
"It was during the course of the second quarter of the game Saturday," he said. "One person was hitting me one way and my arm was locked, and then I got a shoulder on the elbow and that hyperextended it."
Right now, though, it's too early to tell whether or not he will be able to go this weekend.
"It is just tight and sore and I can't throw," said Krenzel. "It's a day-to-day thing. I'm going to keep icing it and see how it is tomorrow and Thursday."
Team medical personnel have asked Krenzel to not throw until at least Thursday.
"They told me not to throw because there is a risk if I throw, I could tear the ligament and it could be possibly career threatening," he said.
When asked if he possibly did damage to the elbow by playing in the second half, Krenzel said, "It's a possibility, but at the time, we didn't know.
"It's frustrating, but at the same time, I may wake up tomorrow and it will feel better."
When asked if he thought he would play if the condition did not improve, Krenzel said, "Probably not."
For Scott McMullen, it would be his second career start (his first one coming in 2001 against Illinois). McMullen got all of the reps with the first team on Tuesday, while redshirt freshmen Justin Zwick and Troy Smith split the reps with the second team. Ordinarily, Krenzel gets the lion's share of the reps with the first team while the other three split reps with the second team.
"Right now, I am treating it like I am going to be the starter," said McMullen. "I don't know too much (about Krenzel's condition). I guess it's a day-to-day thing."
McMullen said he is going to be busy trying to make the transition from reserve to starter.
"I'm taking a lot more reps than I am used to," he said. "I need to get ready and get in game condition."
McMullen is for 0 for 1 passing this season. In that one start against Illinois (a 34-22 loss), he was 4 of 13 with a 10-yard touchdown pass. For his career, McMullen has completed 36 of 64 passes (56.2 percent) for 488 yards with four touchdowns and one interception.
"I was probably more nervous with that Illinois game a couple of years ago," McMullen said. "I just woke up Friday morning and had all the confusion. Now I know I could be in there early in the week.
"I'm more relaxed and more confident in what I'm doing."
Tight end Ben Hartsock said McMullen seemed relaxed during practice today.
"We deal with this injury just like at any other position," Hartsock said. "Scott came in and ran the offense pretty well today. He did a good job in the huddle.
"Scott is a good quarterback. He will read the field and find the open man. His nickname is the Gunslinger, so we know he can throw the ball in there. He may not have the ability to make as many checks and presnap reads as Craig does.
"But in another school, across the country, Scott could be a starter."
* Fullback Branden Joe (torn pectoral) was back in full uniform today, although his status for Saturday is unclear.
"I think he is probably pretty close," Spencer said. "He donned some pads today and that was a positive for me. When he will be 100 percent, I don't know."
* Spencer is also hopeful that tailback Lydell Ross (toe) will be ready to go against BG after carrying just four times against N.C. State.
"I think he's as close to being 100 percent as he has been in a long time," Spencer said. "He wasn't in for treatment today, which is an indication you're OK and things are looking good. He's closer to where he needs to be."
Ross added that he is feeling much better.
"I feel good, better than last week," Ross said. "I felt better today than I did going into the game. The toe feels better now than any time since I hurt it.
"I really had no idea how I would be used. I just went in when the coach called for me. I have gotten a lot of treatment and I feel very close to 100 percent."
* Flanker Santonio Holmes sat out most of the practice with a shoulder injury.