The University at Buffalo Bulls outside linebacker Khalil Mack has been suspended indefinitely for violating team rules and is not allowed on UB’s campus after a fight with teammate Fred Lee, the Buffalo News’ Rodney McKissic reported Monday night.

Even though the source isn’t identified in the Buffalo News’ report, it’s clear that Mack’s role in the fight has him in greater trouble than Lee, who was back at practice Monday. Mack missed the Bulls’ scrimmage on Saturday and practice Monday, McKissic notes.

Not surprisingly, head coach Jeff Quinn shed precious few details on the Mack situation:

“It’s being handled,” Quinn said to McKissic. “Right now it’s a day-by-day situation but it’s being handled. It’s the right way to do it.”

Arguably the most feared defender in the MAC, Mack—a former two-star recruit under Turner Gill—has racked up 2011 postseason and 2012 preseason accolades. A candidate for the Bronko Nagurski and Lombardi awards, Mack’s first-step and speed-strength combination is lethal, a frequent worry for even double and triple teams. Without the Bulls’ talented junior, the pass rush shifts from dangerous to tepid, as only Steven Means has shown the ability to prey on opposing QBs.

Mack’s dust-up with Lee comes as a major surprise, as the elite defender doesn’t have a checkered history whatsoever. In fact, in Brian Josephs’ UB Spectrum article from last fall, Mack’s talent for the guitar came to light.

“The linebacker [Mack] would listen to Petit play, and after being around others who played instruments at his church in Fort Pierce, Fla., Mack was sold,” Josephs wrote. “Being occupied between games and practices was an added bonus.”

Mack’s status is worth monitoring closely over the coming days—UB opens its season on the road against the University of Georgia on Sept. 1.

(Header photo courtesy of Don Nieman from last year’s Stony Brook vs. UB home opener— full gallery here).