Sentence:  The NFL renaissance of Doug Flutie is a reminder of one of the great plays in college football history. ... "The play was called 'Trips Right, Flood Tip,'" Phelan said. "That meant three receivers to the right side, <WSD>flood the zone</WSD> and try for the tip." 
Meaning of the word marked with <WSD> tags:  To fill a relevant region of the field of play.