Offensive commander Justin Scule suffered an injury by the end of the season in practice this week and the 49 removed him from the active list on Friday.
Scullet was denied an injury sign by the 49ers. The team also officially announced the signing of veteran attacking commander Senyo Kelemete.
He will return to the injured reserve if he remains unclaimed.
Scullet tore the ACL in the same training session on Monday in which Tarvarius Moore fell with a torn Achilles. The 49ers called for an early end to their off-season training the next day. He has appeared in 31 games in the last two seasons and made 12 starts.
Kelemete has experience in security and will try to use it to win a place on the list of 53 men with Niners.