The 49ers have signed rookie outside linebacker Corey Lemonier to a four-year contract, the NFL disclosed in its Monday transactions. He was the club’s third-round pick (No. 88 overall).
Lemonier, 21, notched 5.5 sacks at defensive end for Auburn in 2012. He declared for the draft with one season of eligibility remaining. His most productive season came as a sophomore, when he notched 44 tackles and 9.5 sacks for the Tigers.