DeKeyser, 32, played 59 games for the Detroit Red Wings last season, recording 11 points (0-11-11) and 26 penalty minutes. He ranked second on the Red Wings in blocked shots (102) and fifth among defencemen in hits (49) while averaging 18:30 in time on ice.
In 547 career NHL regular season games, all with Detroit, DeKeyser has accumulated 146 points (33-113-146) and 266 penalty minutes. The 6'3", 183-pound blueliner has also appeared in 19 career NHL playoff games across four postseasons with the Red Wings, collecting a goal and an assist.
A native of Detroit, Michigan, DeKeyser represented the United States at the 2014 and 2017 World Championships, appearing in 16 games.
DeKeyser was originally signed by Detroit as an undrafted free agent on March 29, 2013.