Without him, till he was an "extra", I'm not thinking that exactly makes him vital.
Ok, ok...was he a Muppet baby?
(No, wait, a negative might be a plus in his favor....)
"The University of Illinois is also in turmoil. The university sports an Interim Chancellor, an Interim Athletic Director, and an Interim Football Coach; the game will be played at Soldier Field, making this an Illini Interim Home Game."