SANTA CLARA -- The 49ers placed rookie defensive tackle Tank Carradine on injured reserve Tuesday, ending the second round pick's season without him seeing any action.

Carradine opened the season on the non-football injury list as a result of torn right anterior cruciate ligament suffered as a senior at Florida State last year. He was activated from that list on Oct. 29, but hadn't appeared in any games.

The 49ers replaced his spot on the roster by signing offensive guard Ryan Seymour off the Seattle Seahawks practice squad. They also signed wide receiver Devon Wylie to the practice squad.

Carradine had 16 ½ sacks over his final two years at Florida State, including 11 as a senior before his injury. That was enough for the 49ers to make him a second round (No. 40 overall) despite not being 100 percent. Now he'll have to wait until next season to see if he can make an impact at the NFL level.

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