As a result, sophomore Hayden Rettig, who had been competing with Laviano in an extremely close battle to be the starter, will get the nod at quarterback in the season opener on Sept. 5.
The 6-foot-3, 210-pound Rettig sat out last season after transferring from LSU, where he was recruited as a four-star prospect. He has shown off a strong arm and accuracy in training camp.
Laviano played in five games as a redshirt freshman, completing 11 passes and rushing for 69 yards.
Carroo was second in the Big Ten with 1,068 receiving yards last season. He passed on declaring for the NFL draft and is a team captain.