"We will handle this matter internally," a team spokesperson said.
Screenshots surfaced on Wednesday of Leipsic making crude comments in a private group chat with his friends.
The NHL also released a statement on the matter.
"The National Hockey League strongly condemns misogynistic and reprehensible remarks made by players Brendan Leipsic and Jack Rodewald in a private group chat that has surfaced on social media," the statement said. "There is no place in our League for such statements, attitudes and behavior, no matter the forum. We will address this inexcusable conduct with the clubs and players involved."
Leipsic quickly issued an apology on Twitter on Wednesday:
The 25-year-old signed a one-year deal with the Capitals last summer. He previously spent time with the Toronto Maple Leafs, Vegas Golden Knights, Vancouver Canucks, and Los Angeles Kings.