From NHL.com:
The Bill Masterton Memorial Trophy is an annual award under the trusteeship of the Professional Hockey Writers' Association and is given to the National Hockey League player who best exemplifies the qualities of perseverance, sportsmanship, and dedication to hockey. The winner is selected in a poll of all chapters of the PHWA at the end of the regular season.
The Nashville Predators' Steve Sullivan won the 2009 Masterton Trophy tonight at the NHL Awards in Las Vegas, and is the first Predator to win a trophy at the annual event. For more on his big win, check the Predators web site, and revel in the video below: