The Oklahoma Highway Patrol reported that the accident happened on Sept. 8 between the hours of 5:00 p.m. and 6:00 p.m. at Hwy 177 and 45th in Shawnee, Oklahoma.
Grice was waiting at a red light when another driver smashed into the rear of his vehicle, which sent the UFC fighter's car into the back of the vehicle in front of his.
Grice's wife, Caroline, says her husband is out of surgery, but doctors are treating him for bleeding on his brain.
The report states that Grice's eyes are responding to light, which indicates brain activity. However, doctors are waiting until later on Sept. 9 to update his condition to the public.
"Matt is showing more brain activity this AM by moving his eyes and dilation," his friend tweeted.
Grice, a UFC fighter who competes in the UFC's featherweight division, is also a graduate of Oklahoma University, where he was a standout wrestler.
At Harrah High school, Grice was a four-time Oklahoma State Wrestling Champion, winning Outstanding Wrestler three times, a feat which has never been accomplished by any other competitor.
After his senior season, Grice was the most highly recruited wrestler in the nation at his weight.
He decided on the University of Oklahoma, where he graduated with a Bachelor's Degree in sociology.
After graduating from college, Grice made the natural progression from wrestling to MMA.
He had a knack for the sport from day one, as he won nine straight fights before getting the call to compete in the UFC in 2007.
Grice has dropped two of his last three UFC fights, but he was expected to fight Jeremy Larsen on Oct. 19 at UFC 166.
Obviously that fight now seems to be in jeopardy being that Grice was involved in a serious car crash.
Fight fans should keep Grice in their prayers this afternoon.