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49ers sign OLB Shawn Lemon in wake of Aldon Smith's release

The San Francisco 49ers have signed outside linebacker Shawn Lemon, who was with the Pittsburgh Steelers this offseason after spending time in the Canadian Football League as well as the Arena League.

The move comes a day after the 49ers cut pass-rushing linebacker Aldon Smith.

Lemon had 13 sacks and tied a CFL record with eight forced fumbles last season for the Gray Cup champion Calgary Stampeders. The 49ers' roster is now back to a full 90 players.

Coach Jim Tomsula also gave an injury report in advance of Saturday's 4:15 p.m. PT padded practice:

Not practicing: DL Tank Carradine (sick), WR Bruce Ellington (leg), ILB Phillip Wheeler (leg).

Monitored reps: DL Kaleb Ramsey (undisclosed), CB Leon McFadden (foot), WR Issac Blakeney (leg), TE Busta Anderson (sore), LB Aaron Lynch (hamstring), DL Darnell Dockett (knee), DB Jimmie Ward (undisclosed), RB Reggie Bush (vet treatment), S Jaquiski Tartt (toe), RB Kendall Hunter (knee).