Pittsburgh Steelers wide receiver Limas Sweed injured his left Achilles tendon Sunday -- the final day of a three-day minicamp -- and coach Mike Tomlin said it could be serious.
"I don't know where Limas stands at this point, because he just suffered what appears to be an Achilles injury," Tomlin said, according to the Steelers' official Web site. "Of course, I will have more information in regards to that, probably as early as (Monday). That probably takes precedence as we sit here today."
Sweed was hurt during a routine passing drill and was taken off the Steelers' indoor practice field on a cart. He later left the team's practice facility on crutches.
"I didn't have direct eyes on him (when he was hurt)," Tomlin said. "It's just one of those things."
If the Achilles is ruptured, Sweed likely would miss the season.
Sweed, a second-round draft pick from Texas in 2008, had seven catches in his first two NFL seasons and was a major disappointment to the Steelers. He was removed from the active roster Dec. 22 for what the team said were personal reasons, not the result of an injury.
"There were just some personal things that I went through in my life, but my family and the Steelers helped me get through it," Sweed said Friday. "But I feel like a kid again. It's good to be back playing."
The Associated Press contributed to this report.