Maybe...because he is kinda sucking...?
From earlier this year MSU Coach Dantonio on Arnett -
"We didn't want to play him in a game where there was a blowout because of the potential to do that, and so we held him on that," Dantonio said of Arnett being missing from a 55-17 win against Youngstown State where 10 players caught passes.
"He's a good player, but he's got to do certain things a little bit better in certain places, and that's just the nature of it. If we can redshirt him, we probably will."
The lack of production from Arnett thus far has been a surprise. He caught 24 passes for 242 yards and two touchdowns as a freshman at Tennessee and received a waiver to play immediately upon transferring to Michigan State for his sophomore season. He ended up with three receptions for 69 yards in seven games.