Mike Norvell was Arizona State football offensive coordinator for four years.
Since then, ASU has gone through OCs at an alarming rate. Zak Hill is the fourth to hold the position since 2016 with the three before him staying for no more than two seasons.
It hasn't been a revolving door due to failure. Norvell left for a head coaching job at Memphis as did Billy Napier at Louisiana after 2017. In between, Chip Lindsey made a parallel move to become Auburn's offensive coordinator that led to him becoming a head coach at Troy in 2019.