49ers add linebacker Bishop

The 49ers signed former Packer linebacker Desmond Bishop Tuesday. They also made two more roster moves, including putting Kassim Osgood on injured reserve.

SANTA CLARA, Calif. - Needing to add depth at inside linebacker, the San Francisco 49ers Tuesday signed former Packer and Cal bear Desmond Bishop.

The 49ers needed depth at inside linebacker after rookie Chris Borland sustained an ankle injury in Sunday's loss to the Seattle Seahaws that knocked the team out of playoff contention. Borland's status for Saturday's game against the San Diego Chargers is up in the air.

Bishop (6-2, 244) won a Super Bowl with Green Bay in 2010, appearing in 15 regular season games, where he made 75 tackles, including three sacks. In the postseason, the former sixth-round pick had 21 tackles and a sack of Michael Vick in the Wild Card round of the playoffs.

Borland's absence forced San Francisco to call upon second-year player Nick Moody, who played a career-high 25 snaps, taking his first defensive reps of 2014. Last season, Moody played 10 snaps against the Rams in Week 13 after being drafted in the sixth round out of Florida State.

Moody was at the center of one of the biggest plays of the game Sunday, when he was flagged for roughing the passer on Russell Wilson early in the fourth quarter deep in 49ers' territory. Wilson's incompletion would have forced a 32-yard field goal, potentially giving Seattle a 13-7 lead. Instead, rookie wideout Paul Richardson scored a touchdown two plays later after the flag kept the Seahawks' drive alive.

Monday, the NFL's vice president of officiating Dean Blandino went on NFL Network to say referee Ed Hochuli got the call wrong.

"In looking at it, it was not (the correct call)," Blandino said. "The rule protects a passer from two types of hits: Hits to the head or neck, or hits with the crown or forehead, which is just below the crown part of the helmet, and that's what the referee called.

"It's close, but when you look at it on tape, (49ers linebacker Nick) Moody's head is up, he hits with more of the side and the facemask to the body of the quarterback, and in our review, with the ability to look at it in slow motion, it's not a foul."

After spending six years with the Packers, Bishop moved on to the Minnesota Vikings last season before signing late in the summer with the Arizona Cardinals. Arizona released Bishop Dec. 1 after not playing a down this season.

To make room for Bishop on the active roster, the 49ers placed receiver/special teams ace Kassim Osgood on injured reserve, becoming the 14th player to be added to the list this season. Osgood sustained a broken third metacarpal in his hand early in Sunday's loss, but played through it, making a pair of special teams tackles.

San Francisco also re-signed tight end Xavier Grimble to the practice squad. The USC alum was on the 49ers' practice squad for a month earlier this season, but was released to make room for cornerback Marcus Cromartie, who was put on the active roster last week. Reserve tight end Garrett Celek left Sunday's game with an ankle injury and it is unknown if he can play Saturday against San Diego.

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