Ultimately, the fan was booted from the game ... and then hit with a perma-ban from ALL MLB ballparks by officials less than 24 hours later.
"While the Yankees appreciate the spirit and passion of our fans in our various rivalries -- especially with the Red Sox -- reckless, disorderly and dangerous behavior that puts the safety of players, field staff or fellow fans in jeopardy will not be tolerated," Yankees officials said in a statement.
"There is absolutely no place for it at Yankee Stadium. The safety of everyone at Yankee Stadium, including guests in the stands and players on the field, will always be the top priority for the Yankees organization every time we open our doors."
Both the Red Sox and Yankees managers, Alex Cora and Aaron Boone, denounced the fan's actions ... with Boone calling it all, "awful, embarrassing" and "unacceptable."
Aaron Boone sounds off on the Yankee fan who hit Alex Verdugo with a ball:
"There's zero place for that in this great game and in this great rivalry. Players should never feel like they have to worry about anything like that." pic.twitter.com/MNO8nd8zTA