Hillen, 26, has registered one assist and 10 penalty minutes in 10 games with the Capitals this season. Hillen ranks eighth on Washington in average ice time per game (18:21) after missing 25 games with an injury.
The Minnetonka, Minn., native recorded two goals, six points and 20 penalty minutes in 55 games with the Nashville Predators last season. He finished the season eighth on Nashville in plus/minus (plus-6) and tied for eighth in blocked shots (65). Hillen made his Stanley Cup Playoffs debut last season, appearing in two games of the Western Conference quarterfinal series vs. the Detroit Red Wings.
Hillen has collected 10 goals, 57 points and 139 penalty minutes in 240 career NHL games with the New York Islanders, Nashville and Washington. He posted career highs in goals (four), assists (tied; 18), points (22) and penalty minutes (45) during the 2010-11 season with the Islanders and had one assist in six games with the United States during the 2010 World Championship.
The 5-foot-10, 190-pound blueliner spent four seasons with Colorado College of the WCHA. Hillen earned WCHA Defensive Player of the Year, WCHA First All-Star Team and NCAA (West) First All-American Team honors during his senior season in 2008. He was signed as an undrafted free agent by the Islanders on April 1, 2008.