There is no player under more pressure to perform for the Pittsburgh Steelers than Byron Leftwich.
Leftwich has the tough task of leading the Steelers while Ben Roethlisberger is out for the foreseeable future with a potentially life-threatening rib injury.
According to Ed Bouchette of the Pittsburgh Post-Gazette:
#Steelers Ben Roethlisberger has a rare rib injury that could kill him by pressing against his aorta. Too big risk. Has to wait until heals— Ed Bouchette (@EdBouchette) November 14, 2012
Leftwich isn't the only Steelers player who needs to step up to the plate and deliver while Big Ben is out either.
Here are the 10 players who absolutely must not fail to perform while the Steelers attempt to make the playoffs without their quarterback, leader and MVP.