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SANTA CLARA — Laken Tomlinson signed a three-year contract extension Friday, entrenching him as the 49ers starting left guard and clearing up on the few depth-chart mysteries heading into next month’s training camp.
Tomlinson, 26, started the final 15 games last season, shortly after being acquired from the Detroit Lions, who used their 2015 first-round draft pick on him. He seemed to improve as the 6-10 season progressed, as did most of his teammates, especially in the run-blocking aspect as well as upon Jimmy Garoppolo’s 5-0 debut as the starting quarterback.