Hamstring injury knocks Matthews out

CINCINNATI -- Green Bay Packers linebacker Clay Matthews has another hamstring injury.

It’s the same injury that has been a problem for Matthews throughout his career.

He was listed as questionable but has not played in the second half.

He was having a monster game with a sack and two forced fumbles. Matthews has missed games in 2010 and 2012 because of hamstring injuries and also had one during training camp in his rookie season of 2009.