Frankie Edgar's coming out of retirement ... but not everyone is thrilled with the decision!
TMZ Sports talked to the 43-year-old MMA legend ahead of his bare knuckle boxing debut against fellow former UFC star Jimmie Rivera at BKFC 82 ... after almost 3 years away from fighting.
We asked Frankie how his family felt about his decision to once again make the walk.
"Not too good," Edgar said while laughing. "They definitely did not want me to do this. But we had a serious talk, and I got the okay from my wife.