Joseph-Day played two games with the 49ers last season after being released by the Chargers in November. A run stuffer who has bounced around the league since 2021, Joseph-Day joins a Titans defense graded by Pro Football Focus as the NFL’s ninth worst rush defense in 2023.

A day after losing big to the Ravens in Week 16, the 49ers add to their defensive line with Arik Armstead missing three straight weeks due to injury. Joseph-Day was released by the Chargers and now signs with a contending NFC team. He is a big body for the 49ers to utilize in an already intimidating defensive line.

Joseph-Day exited late in the fourth quarter with a knee injury and was unable to put any weight on it. The veteran defensive tackle was signed to a three-year contract this offseason and has been a staple along the Chargers' defensive line. He's totaled 44 tackles, one sack and seven TFLs on the season and has appeared on over 500 defensive snaps per PFF. Staley did not give a timetable for his return.