The defenseman, who was making his season debut after being recalled from Utica of the American Hockey League on Thursday, signed a one-year, one-way free agent contract with New Jersey on July 1.
Evan Rodrigues had a goal and an assist, Lenni Hameenaho and Stefan Noesen also scored, and Arseny Gritsyuk added two assists for the Devils (14-6-0), who have won six of their past seven games (6-1-0). Connor Hellebuyck made 26 saves and is 6-0-0 since being traded to New Jersey from the Winnipeg Jets on Oct. 23.
Ryan Leonard and Pierre-Luc Dubois each scored, and Logan Thompson made 24 saves for the Capitals (10-7-0), who had won two straight.
The Devils won their seventh straight game on home ice, tied for the fifth longest streak in Kansas City Scouts/Colorado Rockies/Devils history.
Rodrigues gave the Devils a 1-0 lead with a power-play goal at 2:20 of the first period. Timo Meier skated down left wing before passing to Rodrigues for the snap shot in the right face-off circle.
Leonard tied the game 1-1 with a power-play goal off a backhand at 14:10. Cole Hutson made it possible, shielding the puck just over the blue line before feathering a pass through two defenders to Leonard skating to the slot. It was Washington’s seventh shot of the power play.
Dubois gave Washington a 2-1 lead on a snap shot along the ice from the right circle, beating Hellebuyck inside the left post at 2:11 of the second period.
Hameenaho, who was also recalled from Utica and was making his season-debut for the Devils, evened it 2-2 off a net-front deflection at 9:51. Brenden Dillon took the initial shot from the top of the left circle.
Kolyachonok scored to give the Devils a one-goal lead and make it 3-2 when the defenseman sent a wrist shot from the right point that got through a screen and trickled past Thompson at 6:27 of the third period.
Noesen pushed it to 4-2 with a backhand on a breakaway at 17:07. Noesen was recalled from Utica on Wednesday after missing the previous 11 games.
Jack Hughes scored an empty-net goal at 19:15 for the 5-2 final.
