Arena, who led New England to a Major League Soccer-record 73 points this season, also won the award with DC United in 1997 and the LA Galaxy in 2009 and 2011.
National Sports
Tom Caron: MLB labor talks could bring much-needed changes on the field
While financial issues are at the heart of the disagreement between owners and players, the sport would benefit from rule changes that create more on-field action.
Mora says UConn was the uphill job he wanted to take
The former NFL coach is ready for one more coaching challenge.
Sidelines: David Ortiz presents a dilemma for Hall of Fame voters
Red Sox slugger is tied to baseball lore, but his inclusion would require voters to think differently about steroids, Drew Bonifant writes.
Cincinnati moves into College Football Playoff position
Cincinnati has moved into position to make the College Football Playoff, climbing a spot to fourth behind Georgia, Ohio State and Alabama
Top rivalries: Iron Bowl, The Game, Army-Navy, Red River
The best college football rivalries can change over time
Tom Brady and the Buccaneers rout the Giants
Super Bowl champion Tampa Bay snaps a two-game losing streak and Brady avoids dropping three in a row for the first time since 2002.
Forbort scores twice to help Bruins beat Flyers 5-2
Derek Forbort had two goals to lead the Boston Bruins to their third straight victory, 5-2 over the Philadelphia Flyers
Tatum (33 points), Schroder (29) carry Celtics past Thunder
Jayson Tatum scored 33 points, Dennis Schroder had 29 and the Boston Celtics beat the Oklahoma City Thunder 111-105
Balanced Hawks win 3rd straight game, beating Celtics 110-99
John Collins scored 20 points, Cam Reddish and Kevin Huerter had 19 apiece and the Atlanta Hawks won third straight game with a 110-99 victory over the Boston Celtics