Kentavius Street is headed back to a familiar place, injured reserve. The 49ers announced they were shutting down the defensive lineman, in order to make room on the active roster for linebacker Kwon Alexander. 
Street was a highly regarded prospect coming out of N.C. State in 2018. Unfortunately, he tore an ACL during a private workout for the Giants, and tumbled in the draft as a result. San Francisco scooped him up in the fourth round, and he took his rookie season as a redshirt year. Knee issues plagued him again this offseason, and he was placed on IR back in August. It was looking like he was going to miss each of his first two seasons, but the 49ers activated him a few weeks ago for the stretch run.
He made his NFL debut in Week 15, and played a real role on defense over the final three weeks. In their pivotal Week 16 game against the Rams, he played 27 percent of the defensive snaps. He’ll now head into his third season as a pro with just three career appearances under his belt. He won’t necessarily be a lock for next year’s 53-man roster.