SANTA CLARA -- The 49ers on Wednesday replaced injured linebacker Ray-Ray Armstrong on the active roster with former Stanford star Shayne Skov.
"Shayne was actually a difficult cut on the (initial) cut to 53 because I think he did enough to make the team," Chip Kelly said Wednesday. "Obviously, we felt that we had six inside linebackers that were NFL-quality players. So that was a difficult day for Shayne and for us."
Skov, 26, appeared in 15 games last year for the 49ers, finishing with four special teams tackles.
He had 19 tackles, including a sack, in the preseason. He finished second in that category to Michael Wilhoite, who could see a lot of the passing-down snaps that previously had gone to Armstrong. The team’s other inside linebackers are NaVorro Bowman, Gerald Hodges and Nick Bellore.
The 49ers placed Armstrong on injured reserve with a chest injury. He is eligible to return later this year.
The team also signed linebacker Curtis Grant (6-2, 240) to the practice squad. Grant, who played at Ohio State, has spent time with the Chargers, Falcons, Titans and Raiders since going undrafted last season.
Et cetera -- Tackle Anthony Davis was the only active 49er who was not on the field to begin practice. Davis suffered a concussion Thursday and began Wednesday’s session in the team weight room.