Jarren Duran appeared to clash once more with a smack-talking fan on Tuesday night ... and like one his previous, infamous instances with hecklers, it seemed he used some foul language to issue a clap back.
The Red Sox star looked like he got into it with a Boston supporter right after he struck out with the bases loaded in the bottom of the eighth inning of his team's home game against the Baltimore Orioles.
Footage from the Fenway Park broadcast shows that as he was headed to his dugout, someone yelled at him.