Jason Fox locked in for three years with Lions

The potential replacement for Jeff Backus at left tackle in Detroit signed his rookie contract.

Per a league source, tackle Jason Fox signed a three-year contract with a signing bonus of $330,907.  Combine that total with the standard minimum base salaries for rookies and Fox will earn $1.5459 million over the three years of the contract.

Fox is the first of the Lions draft picks to sign.