Case in point, Panthers tight end Tommy Tremble, who gave himself a concussion by lowering his helmet into a tackler on Sunday against the Bears. The NFL has fined Tremble $17,083 for that.
CHICAGO, ILLINOIS - OCTOBER 06: Jaycee Horn #8 of the Carolina Panthers and Matt Pryor #79 of the Chicago Bears are involved in a altercation during the fourth quarter at Soldier Field on October 06, ...