Broncos trade DT Warren to rival Raiders

The Denver Broncos found a surprising trade partner to unload defensive tackle Gerard Warren — the rival Oakland Raiders. The Broncos shipped Warren to the Raiders on Monday for an undisclosed 2008 draft pick. Just one year ago, Warren was deemed the Broncos’ best defensive linemen as evidenced by the six-year, $36 million contract he signed before injuries to both big toes led to an unproductive…