The Nittany Lions couldn't get the offense going in their first loss of the season.
The drop comes after the Nittany Lions' 20-12 defeat by the Buckeyes in Columbus.
After his ninth loss to Ohio State, James Franklin refused to address concerns about Penn State's record against the Buckeyes.
Allar hasn't been dazzling on the road thus far. His struggles continued on Saturday.
The Nittany Lions' consistent failure to convert on third down wound up costing them one of the biggest games of the James Franklin era.
Nelson missed the majority of the game against Northwestern and was absent against UMass.