BOSTON — Tom Hallion’s ass could be in the jackpot — again.

MLB officials are expected to question the veteran umpire for his apparent attempt to show up Todd Frazier on Thursday as the Mets third baseman completed his trot on a walk-off home run against the Marlins in Game 1 of a doubleheader.

Hallion blocked home plate so that Frazier was chest-to-chest with the umpire as he scored the winning run, with teammates celebrating nearby.

“I kind of bent down and put my foot through there and we could have been dancing,” Frazier said Friday before the Mets faced the Red Sox at Fenway Park. “I bumped [Hallion]. I had to get in there. He laughed a little bit. If he was stepping in for the charge, that would have been fun.”

Joe Torre, who oversees MLB’s umpiring, is expected to discuss the matter with Hallion, according to league sources, because of concerns about the optics presented by the situation.

Mets manager Mickey Callaway said he believes Hallion’s roadblock was a joke that became misconstrued. Callaway’s perception of the incident is based on conversations he had with umpires before the nightcap of the doubleheader — Hallion was only scheduled for the first game.

“[Hallion] was happy that he got to go home and he didn’t have to umpire the second game,” Callaway said. “So [the umpires] said he was just standing there happy that he got to go to dinner, that he didn’t have to continue.”

Frazier also defended Hallion, to a certain extent.

“I am not looking too far into it, but at first I was just befuddled,” Frazier said. “But, hey, things happen — only to me. It’s the craziest thing. The Jersey guy gets picked on.

“Maybe he was happy that he was going home and he was standing on home plate. He might have left and had a really good dinner that night, so he was excited we didn’t go into extra innings.”

In a video clip that went viral earlier this summer, Hallion, during a game from May 2016, is heard on microphone defending umpires against a Terry Collins tirade by saying, “Our ass is in the jackpot” — after Noah Syndergaard was ejected for a pitch behind Chase Utley in clear retaliation for the Dodgers second baseman breaking Ruben Tejada’s leg in a takeout slide in the previous year’s NLDS. “Ass in the jackpot,” loosely translated, means “neck is on the line.”

Frazier has become a lightning rod with umpires for his persistent questioning of balls and strikes, which led to an ejection on Tuesday. Frazier also didn’t endear himself to umpires by admitting recently that his leap into the stands to snatch a foul ball at Dodger Stadium was a fake catch. On the play, Frazier says he actually emerged from the stands with a rubber ball that happened to be nearby.

I didn’t even mean to do it,” Frazier said. “It was a ball I picked up. Fortunately we got the out. That was it.

“There have been some quirky things going on with me and the umpires and baseballs and home plate incidents and I looked back and saw Tom and he was kind of smirking like he did something.”