ALLEN PARK, Mich. (AP) The Detroit Lions have signed wide receiver Anquan Boldin.

Detroit made the move just before opening training camp on Thursday.

Boldin bolsters depth at a position depleted by the retirement of Calvin Johnson.

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Boldin ranks among the NFL's top 20 with 1,009 catches and 13,195 yards receiving. He has scored 75 touchdowns and started 182 games with Arizona, Baltimore and San Francisco over his 13-year career.

The 35-year-old Boldin started 13 games last season with the 49ers, making 69 catches for 789 yards. He gives Matthew Stafford another option in a receiving corps that includes Golden Tate and Marvin Jones, a former Cincinnati Bengal, who signed a five-year contract days after Johnson left the league and Lions in March.

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AP NFL website: www.pro32.ap.org and www.twitter.com/AP-NFL