TORONTO -- Boston sports fans can be notoriously tough, but one went way too far on Saturday night when a Maple Leafs fan was knocked out cold by a cowardly sucker punch.
Kyle Hay of Oshawa, Ont., was at Game 2 in Beantown with six buddies to celebrate his 23rd birthday as well as Toronto's return to the playoffs.
Decked out in a mask, blue Mohawk and Wendel Clark jersey, Hay, like his friends, was heckled throughout the game - won 4-2 by the Leafs.
"We had peanuts thrown at us, beer and cups thrown at us. The Boston fans that were in our area were totally cool, they were telling those people to stop because they were also being hit by it all," Hay recalled.
While leaving the arena, Hay was punched in the back of the head and knocked out cold.
A YouTube video surfaced of the aftermath.
The assailant was not found.
Hay was taken to hospital by ambulance and received three staples in the back of his head to close a wound, and suffered a concussion.
Hay said the back of his head is still sore and headaches are coming "off and on" from the concussions, but there is no way he will miss Monday night's game.
A Reddit post by a Bruins' fan claiming to have sat behind the Toronto fans said the group was "harassed the entire time with people throwing things at them."
It went on to say: "They did nothing to instigate any of the abuse they received. When I walked down the Garden stairs he was out cold with his eyes rolled back in his head and blood coming out of his mouth.
He had been wearing a mask and it looked like it was cracked in half from when he was hit. Really disappointing day to be a Bruins fan."
The Twitterverse quickly lit up with suggestions that the Maple Leafs give Hay tickets to Game 3 or 4 at the Air Canada Centre, or find a way to help pay his medical bills.
Hay said he'd love tickets, but deserves them "just as much as the next Leafs fan. I don't need to be treated any differently because of what happened."
It was expected that the team would do something, but there were no immediate details.
Hay joked about the mugging on Sunday, tweeting: "Thanks to everyone for the b day love and asking if I'm ok just want to apologize to leafs nation for wearing a leaf jersey while getting ko."
A day later, with reaction multiplying by the minute, Hay thanked those who had chimed in.
"The support is phenomenal, it's amazing," he said. "A lot of Leafs fan across Canada and as well, the amount of Boston fans that have apologized on behalf of that guy saying, 'That's not Boston, that's not us. One guy ruined it'."
Hay said he would attend a road Leafs game again -- but only in the lower bowl if in Boston and not with a mask or blue Mohawk.mask or blue Mohawk.