The Steelers placed WR Limas Sweed on injured reserve on Tuesday. Sweed, a third-year pro from Texas, ruptured his left Achilles tendon on May 2.
The Steelers waived Sweed on Monday, but he cleared waivers, and the club elected to assign him to injured reserve.
Sweed, 25, played nine games for Pittsburgh last season, catching one pass for five yards. He ended the season on the reserve/non-football illness list with an undisclosed illness.
To take Sweed's spot on the roster, the Steelers signed WR Isaiah Williams, whom the Ravens released last January, on Monday. Williams, 23, played collegiately at Maryland and went undrafted in 2009.
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