It is unclear exactly what happened in the incident, but Trannon collided with teammate Shannon Brown and Wolverine forward Graham Brown. Trannon walked off to the bench holding his jaw after the collision.
"Talking to Matt Saturday night, he was devastated," said coach Tom Izzo. "I'm hoping and praying that he will be out the minimum. We are calling around and seeing if there's any kind of mask he can wear that can allow him to play, but it won't be in the near future."
According to Izzo, Trannon could possibly be out three weeks and at the worst be out six to eight weeks.
Trannon had been the Spartans' starting power forward and actually returned to play in Saturday's game, having no knowledge of the condition of his jaw.
Trannon had a strong game against the Wolverines, scoring eight points on three of five from the field. He also hit both of his free-throws in the game while coming up big on the boards, grabbing seven rebounds.
"It is a critical injury to the guy with the two teams we have coming up because of the positions and defense he (Trannon) plays for us and the style of teams they are," said Izzo. "Matt said he's going to be an assistant coach and get Marquise and G (Suton) and Delco ready for the upcoming games."
Izzo said that he will not consider lifting the medical redshirt of junior forward Drew Naymick in order to help out at the position.
This injury comes at a very bad time because of the tough remaining four games the Spartans have and because March is just around the corner.
Tom Izzo made it clear that every option is being considered in order to get Trannon back playing again, especially in time for the NCAA tournament. Trannon provides veteran leadership as the fifth starter for Michigan State and his absence for however long will be felt.
The pressure is on Marquise Gray now to play key minutes in big games that the Spartans have coming up.