The UMass Football program will be thin at running back this spring after running backs Kayron Lynch-Adams and Greg Desrosiers have both entered the transfer portal. Lynch-Adams who returned to UMass this off-season after exploring the NFL Draft entered the portal on Thursday while Desrosiers, a Massachusetts native entered the portal yesterday. Lynch-Adams rushed for a UMass FBS record 1,157 yards and 12 touchdowns last season, his first as the……