Foster never actually suffered any legal consequences as the result of several off-field incidents during the offseason, but the NFL still suspended him two games for violating the league’s conduct and substance abuse policies. The 31st overall pick in the 2017 draft, Foster was outstanding in his 10-game rookie season, posting 59 tackles in total. He should slide back in as San Francisco’s weak side linebacker while veteran Malcolm Smith moves to the strong side.
Tobin, 30, boasts 57 games of pro experience with the Eagles and Seahawks, but he’d been inactive for each of the 49ers’ first two games. He signed with the Patriots this offseason but was released during final cutdowns, and signed with the 49ers two days later.