He led the Chargers in special teams tackles last season and caught a game-winning 26-yard touchdown pass during a 41-38 victory over the Kansas City Chiefs at Arrowhead Stadium in November.
An All-Western Athletic Conference career at Fresno State Ajirotutu signed with the Chargers in 2010 as an undrafted free agent.
He played in 14 games for San Diego last season and has 20 career catches for 375 yards and three touchdowns.
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Aaron Wilson covers the Ravens for The Baltimore Sun