Steelers wide receiver Limas Sweed injured his left Achilles tendon during the team's three-day minicamp this weekend.
Pittsburgh coach Mike Tomlin believes that the injury could be serious.
Sweed was hurt during a routine passing drill on Sunday and was taken off the Steelers' indoor practice field on a cart.
If his Achilles is ruptured, he'll likely miss the season.
Sweed Injures Achilles During Minicamp