Maroon has 30 points (14 goals, 16 assists) and 60 penalty minutes in 57 games this season, after he had NHL career highs of 27 goals and 42 points last season. He skated on a line with Connor McDavid for much of the past two seasons in Edmonton.
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Maroon played with Hall on the Oilers, and with Ben Lovejoy, Sami Vatanen and Kyle Palmieri with the Ducks. Maroon played for Devils coach John Hynes at the 2016 IIHF World Championship.
"I liked his aggressive play with getting in on the forecheck and creating offense," Maroon said of Hynes. "He gets players to play hard for him every single night, and that's what I like. He challenges you to be really good and we hit it off really well at [the] world championships. He brought a really young team to a bronze-medal game that we didn't expect, so I'm excited to join him and the staff the next six weeks for this run and playoff push."
The Devils (32-22-8) hold the first wild card into the Stanley Cup Playoffs from the Eastern Conference. They're fourth in Metropolitan Division, four points behind the Philadelphia Flyers and Pittsburgh Penguins, who are tied for second.
The Oilers (27-31-4) are 15 points behind the Calgary Flames for the second wild card from the Western Conference.
"This is a hard league to win in the playoffs," Maroon said. "I bring that playoff jam, what playoff hockey is all about. I like getting in on the forecheck and scoring some dirty goals."
New Jersey plays at Pittsburgh on Tuesday (7 p.m. ET; SN, TVAS, ATTSN-PT, MSG+, NHL.TV). Shero said he doesn't know if Maroon will play because of travel.
Dudek, 22, was selected by the Devils in the sixth round (No. 152) of the 2014 NHL Draft and is in his third season at Boston College. He has 17 points (six goals, 11 assists) in 33 games this season.