Blackhawks rely more on defenseman Calvin de Haan with Duncan Keith, Olli Maatta out

Blackhawks defenseman Calvin de Haan doesn’t usually drink much coffee.

But as he walked out of the Hawks’ meeting before their game Friday against the Devils, the scent wafting out of his paper cup indicated otherwise.

‘‘It just helps a little bit here and there,’’ de Haan said, laughing. ‘‘Some guys take other stuff, but it just gets me going. I like the taste, even though I don’t drink it that often.’’

De Haan needed all the extra energy he could get in the Hawks’ back-to-back road victories against the Bruins and Devils. Beyond notching his 100th career point with an assist Thursday in Boston — in front of his mom, Kathy, no less — de Haan handled an enormous workload with the Hawks’ defense down two regulars.

He played a season-high 25 minutes, 26 seconds against the Bruins, then followed that with 23:38 against the Devils. The two-game total of 49:04 is the most he has logged in a back-to-back in his career and marked the first time he had played more than 23:30 in consecutive games since March 2014 with the Islanders.

‘‘It doesn’t feel like 25 minutes sometimes,’’ he said. ‘‘But when you look at the stat sheet after the game and you feel a little tired, it does feel like that sometimes. The coaching staff’s given me an opportunity here. I’ve been getting good minutes all season, so it’s really hard to complain. They’ve been putting a lot of trust in me in key times in games, and I just try to be reliable.’’

With Duncan Keith (groin) on injured reserve and Olli Maatta out temporarily with an illness, coach Jeremy Colliton had to use both Slater Koekkoek and Dennis Gilbert in the lineup. He also had to elevate his usual second- and third-pair guys.

De Haan was the biggest beneficiary, but Connor Murphy played more than 22 minutes and Brent Seabrook more than 20 in both games, too.

‘‘Those guys are playing great,’’ goalie Corey Crawford said Friday. ‘‘Blocking shots and doing a lot of the little things you don’t really get to see on the highlight reel the next day, but things that definitely make a difference in getting the puck out quick.’’

The collective effort enabled the Hawks to allow only three even-strength goals in the two games, despite an obvious fatigue factor.

De Haan said preserving energy can’t be on one’s mind during the first leg of a back-to-back, but it’s the top priority as soon as that game ends.

‘‘Everyone has their own routine,’’ he said. ‘‘For the most part, everyone just tries to conserve energy and maybe lay around a bit more.’’