Northern Illinois defensive tackle Ken Bishop has visited the Oakland Raiders, Dallas Cowboys, Jacksonville Jaguars and the Miami Dolphins, according to a league source.

Bishop is an All-Mid-American conference selection projected as a later-round draft pick.

Bishop had 59 tackles, 5.5 for losses last season, with an interception.

The 6-foot-1, 308-pounder has run the 40-yard dash in 4.96 seconds.

He's bench pressed 225 pounds 29 times.

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Aaron Wilson covers the Ravens for The Baltimore Sun