An MRI after a routine physical on Friday revealed the stress fracture on Collie's tibia, just below the knee cap, BYU trainer Kevin Morris said Saturday, but would not predict when the All-American candidate will return to action.

Collie watched Saturday's first practice of fall camp from the sidelines wearing a helmet, shorts and tennis shoes.

"It's really not that serious. Just a minor setback," the junior said. "It's nothing bad. ... We just want to make sure it doesn't linger throughout the year."

BYU coach Bronco Mendenhall said Collie will "probably need two weeks of rest," and expects him back in plenty of time for the season opener He said it will give coaches more time to look at players such as Luke Ashworth and Spencer Hafoka in fall camp.

"It might be a blessing," he said.

Morris said surgery would not be required to repair the damage, which did not happen from a single incident but is the result of gradual wear and tear.

"As the pain subsides, he will increase his activity. If the pain stays low, we will increase the activity, so it is basically a day-to-day, week-to-week type thing."

Collie said the leg has been nagging him for about three weeks.

When he checked in for his physical earlier this week, he told BYU team doctors about it and they sent him for an MRI, which came back positive.

"The plan is to train and get it to the point where it doesn't hurt any more," he said. "And however long that takes, it takes. I mean, it could be anywhere from two weeks to five weeks."

Collie said if he had to play today, he could go for about a half or three quarters.

"Last week, I was throwing with Max [Hall] and Dennis [Pitta] and I could only run about five routes and it started bugging me too much," he said.

Asked if he will be ready for the season, Collie said: "No doubt. I will be ready."