Cincinnati Bengals linebacker Vontaze Burfict has yet to sign his four-year, $20 million contract, or practice this week.

Why?

Bengals coach Marvin Lewis attributed Burfict's absence to a stomach virus.

“I don’t know if they tried to give him the signing bonus in nickels or what, weighing him down,” Lewis said.  “As you know how we believe it here until the club and the player have signed off it’s not signed off. I would guess we expect him to sign. Obviously the agent believes he has a deal. We didn’t release it.”

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Aaron Wilson covers the Ravens for The Baltimore Sun