In January, Nationals OF Bryce Harper posted a video of himself and his brother, Bryan, singing in excitement for Ohio State's College Football Playoff game against Clemson.
Barstool Sports shared it on their Instagram account, where Syndergaard responded in the comment section, calling Harper a "douche."
When Harper was asked about comment over the weekend at Nationals camp, the outfielder didn't exactly laugh off the incident.
"I don't know, Syndergaard does what he does and the Mets do what they do," Harper told reporters, according to Kevin Kernan of the New York Post. "So we are going to worry about what we do in our clubhouse and do everything we can do win ballgames and hopefully have a better record than any team in Major League Baseball."