Pittsburgh Steelers wide receiver Limas Sweed injured his Achilles tendon during the team's final practice of mini-camp, Ed Bouchette of the Pittsburgh Post-Gazette reports.

The injury is believed to be serious, which may threaten Sweed's availability for the 2010 season.

Chosen with the 53rd overall pick of the 2008 NFL Draft, Sweed has just 7 receptions for 69 yards. The 6-4, 220-pound receiver from the University of Texas finished last season on the "Non-Football Injury" list so that he may deal with "personal issues", details of which are not known.

Prior to the start of the team's "Organized Team Activity" sessions last month, Sweed released the following statement:

"I am excited to be back on the field and back in the locker room with my teammates. I appreciate all the support I received from the Steelers organization while I dealt with some personal issues at the end of the 2009 season. I have been working diligently and I am focused on the remainder of the off-season in getting myself prepared to have a great 2010 season."