The dynamic Boston Bruins pest and the Washington Capitals forward criticized each other after a 4-2 Capitals victory, during which Eller tried to instigate a second-period fight that Marchand refused.
"Everyone saw what he is," Eller said postgame, according to The Washington Post's Isabelle Khurshudyan. "There's not a lot of integrity in his game."
Marchand was ready with a response when asked about it shortly thereafter.
"I really don't feel the need to try to prove anything," he said, according to the Boston Herald's Marisa Ingemi. "He plays 10-12 minutes a night and I'm playing 20."
Eller received an unsportsmanlike conduct penalty for his role in the sequence.