Jorge Rivera has long been a Red Sox fan.
But the UFC middleweight is the one taking center stage at Fenway Park on Sunday.
Rivera will be at Fenway as part of the UFC's Octagon Nation Tour at the city's Latino Family Festival.
"It's cool," said Rivera, who will be signing autographs and taking pictures with fans from 1-3 p.m. "I enjoy meeting people, going out. ... It's cool to mix it up and mingle with fans."
Rivera, 39, has lost two straight, including a split decision to Constantinos Philippou at UFC 133 this month in Philadelphia. He said he doesn't know when or who he'll meet next, but expects to be back in the ring before too long.
"I came off a loss my last fight, so my options are limited," he said. "I have to wait for [the UFC] to see what's next."