It was expected that Ohio State would suffer some roster attrition following the season, but with the transfer portal opening on Dec. 5, the Buckeyes have already taken a couple of hits to their depth. After Jaylen Johnson entered the portal, the Buckeyes have now lost another defensive back with the impending departure of Jantzen Dunn. Dunn, a former four-star recruit from Bowling Green, was rated as the No. 147…