The edginess from the latest chapter of the Michigan State-Michigan rivalry has spilled into this week, with Wolverines coach Jim Harbaugh reigniting the conversation about a pre-game scuffle Monday in his weekly press conference.

During MSU's pre-game walk across the field, a few players collided with Michigan players warming up on the field. Harbaugh called the incident "bush league" post-game, saying a few players got clotheslined and one got his headphones ripped off. Michigan linebacker Devin Bush responded by dragging his cleats across the Spartan logo at midfield.

MSU released the following statement Monday evening clarifying the pre-game timeline: “Regarding last Saturday’s pregame timeline, both teams were distributed pregame timing sheets and were in communication earlier in the week about Michigan State’s pregame tradition of walking the field upon arrival to Spartan Stadium. There has never been an on-field issue with this tradition in the 12 years under head coach Mark Dantonio. The timing of Saturday’s pregame tradition did not change from previous games, nor did the communication change between both schools. MSU was scheduled to leave the Kellogg Center for its walk to the stadium at 9:45 a.m. and left at 9:47 a.m. The team was scheduled to arrive at Spartan Stadium at approximately 10 a.m. and walked the field at approximately 10:02 a.m. As a courtesy, Michigan was granted field access before MSU’s arrival with the understanding from both sides that the U of M student-athletes would leave the field during this tradition. Michigan was on the field prior to 10 a.m. as previously agreed upon, but when multiple MSU staff members asked both U of M student-athletes and staff members to please move off the field for the pregame field walk, this did not occur.”

Harbaugh's comments Monday included calling the altercation an "orchestrated, stormtrooper march."

"I'll go one step further and use coach Dantonio's words from a few years back," Harbaugh told reporters. "It's not a product of their team but their program. That's using his words. That could've been unfortunate. I'm proud of our guys for keeping their cool and waiting for the game to (settle it)."

Saturday evening, MSU head coach Mark Dantonio called Harbaugh's initial characterization of the events "BS."

"As far as everything prior to the game, really not gonna even bother commenting on it," Dantonio later said in his Sunday teleconference. "I've never commented on a coach in the past, I'm not gonna comment on one now. The whole thing to me was sort of juvenile. Things are gonna happen in rivalry games, but I sort of stand by what I said yesterday."