The 49ers have waived linebacker Ray-Ray Armstrong, head coach Kyle Shanahan told reporters, including Matt Maiocco of NBC Sports (Twitter link). The move was made to clear a roster spot for the return of Tank Carradine. 
Armstrong, who received a two-year extension in December, had been relegated to primarily playing special teams after being supplanted in the starting lineup by Brock Coyle in early November. The team leader in snaps at linebacker with 532, Armstrong saw the field for just 14 snaps in Week 10 vs. the Giants.
With emergence of Coyle and first-round pick Reuben Foster in recent weeks, there just wasn’t any room in the linebacker corps on a Niners team looking toward the future. Armstrong ends his tenure with San Francisco with 53 tackles and one sack on the season.
Double digits in IDP league weekly when he plays
Bye-Bye Ray-Ray
So nice they named him twice !!!