Reirden primarily has been responsible for the Capitals defensemen and their power play. Washington defenseman John Carlson had an NHL career-high 68 points (15 goals, 53 points) this season, and the Capitals were seventh on the power play at 22.5 percent.
"He's got history [with us] and he's ready to try it as a head coach and he's been successful with our defensemen," MacLellan said of Reirden. "I think he can handle the personalities in our room."
MacLellan said one of the reasons Reirden is a top candidate is because it would allow for a seamless transition from Trotz.
"The players all know him, they're comfortable with him," MacLellan said. "He'll have a good feel for personalities, how to motivate people and so forth."
Washington captain Alex Ovechkin on Wednesday addressed the possibility of Reirden becoming coach.
"If it's Todd, I'm sure lots of guys, everybody, is going to be really happy," Ovechkin said. "He's a guy who's a very good communicator, very good specialist, and has lots of respect from us."
MacLellan said he feels a formal interview with Reirden is necessary so he can ask him questions he would have asked Trotz.
"I just want to clarify on what he's thinking system-wise and how he's going to handle certain players," MacLellan said.