49ers sign third-round pick Corey Lemonier

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). The 6-foot-3, 255-pound Lemonier will play outside linebacker in the 49ers’ 3-4 front and seems likely to provide depth behind starters Aldon Smith and Ahmad Brooks…