Injuries have sidelined some of the NFL's best names in the past year. Most, but not all, have occurred on turf.

PLAYER	INJURY	SURFACE	HOW IT HAPPENED
Michael Irvin	Neck	Turf	Irvin's helmet and neck twisted on impact with the turf as helmet of Philadelphia's Tim Hauck's caught Irvin in the right shoulder blade.
Shannon Sharpe	Collarbone	Grass	Sharpe was hit by two defenders and landed hard on the ground as he attempted to catch a pass.
Terrell Davis	Knee	Grass	Davis hurt knee making a tackle following an interception at Mile High Stadium.
Ki-Jana Carter	Kneecap	Grass	Carter's run of injuries continued with a dislocated kneecap at Erickson Stadium.
Jamal Anderson	Knee	Turf	Anderson took a handoff at Texas Stadium and fell to the turf untouched, tearing his ACL.
Jeff Blake	Shoulder	Turf	Blake injured his shoulder when Junior Seau tackled him hard to the turf at Cinergy Field.
Vinny Testaverde	Achilles	Turf	Testaverde was untouched after making a quick cut to the ball when Curtis Martin fumbled.
Herman Moore	Knee	Turf	Moore was injured in season-opener in Seattle and was out for four weeks.
Garrison Hearst	Knee	Turf	Hearst was injured in a playoff game in Atlanta a year ago and hasn't returned.