The two collided, the crown of Bush's helmet smacking into the side of Frey's helmet, whipping the linebacker's neck around and spilling him to the turf.

Frey never saw Bush and, despite the helmet-to-helmet hit, the referees never reviewed the play.

Frey was helped off the field by MSU trainers and about 10 seconds of game time later Frey was back on the field, prompting questions over whether he had undergone concussion protocol on the sidelines.

Head football coach Mark Dantonio addressed those concerns at his weekly press conference and said he had not seen the hit on the play, but backed team physician Dr. David Kaufman.

“I know he went through the protocol because everybody always does,” Dantonio said. “Dr. Kaufman is a leading neurologist on our sidelines. He's not up in a box. He's on our sidelines. Our players who have any evidence of a concussion or take any big hit, they immediately see him.”

Dantonio added that Frey did now show signs of a concussion after the hit, nor did he show any symptoms in the days following. He said Frey only had a sore neck and was cleared to play.

Frey discussed the situation after practice Tuesday, echoing Dantonio’s statements and relaying that he felt fine.

“Our training staff put me through a full concussion protocol,” Frey said. “I believe right after I got hit there was a TV timeout, so even though it was only two plays, there was more time there than what everybody thinks.” 

Frey also said he had the wind knocked out of him and would have returned to the playing field if it weren’t for that.

The situation, however, became twofold, with many expressing displeasure with the Big Ten for what they perceived was a missed call.

"Instead of asking questions about our MSU Training Staff. Why don't you start asking the BIG about a targeting review that they skipped,” Chris Frey Sr. tweeted Monday.

Instead of asking questions about our MSU Training Staff. Why don't you start asking the BIG about a targeting review that they skipped.

— Chris Frey Sr. (@bigcfrey) October 31, 2016

The Big Ten released a statement to MLive’s Kyle Austin and isportsweb’s David Harns, which said the play was reviewed but did not meet the threshold for targeting to be called.

"In regards to the play from Saturday's Michigan-Michigan State game, the play was in fact reviewed, and in the judgment of the replay official, the standard of clear and obvious indicators of targeting required for the replay booth to create a targeting call were not met and no penalty was called on the play,” the Big Ten wrote in a statement to Austin and Harns. 

Chris Frey Jr., however, harbored no ill will toward Bush and said he wouldn’t call the play “dirty.”

“I was trying to make a play and he was trying to stop me from making a play,” Frey Jr. said. “I would have done the same exact thing, I would have tried to come back and stop the other team from making a hit on my guy. It’s football, things happen.”