He believes it would be impossible for a referee to safely decide if a player has concussion.
Former inter-county referree, Offaly's Brian Gavin believes it would be impossible for a referee to safely decide if a player has concussion.
St.Rynagh's brought a motion to Offaly GAA Council regarding a free substitution to replace a player who gets a concussion during a game.
But he says some teams could try take advantage of the rule: