Jardine, 37, said he's semi-retired, but hinted that he would like to make a return at some point in the future.
"A lot of people have been pushing me to retire, I’ve been a shell of myself these last couple years," Jardine said in an interview with MMA Fight Corner. "I’ve been saying I’m definitely on the shelf, I’m semi-retired, I’m definitely on the shelf right now."
Later in the interview, Jardine admitted he would like to step back into the cage someday.
"My approach right now is I’m trying to get myself healthy," Jardine added. "And then once I feel like I’m ready to go out and to perform at a level I want to and shock the world, I want to do it. I got to do it again. I don’t care if I win or lose, but I just want to go out there and perform and be Keith Jardine which I haven’t been in the last couple of years. When I dropped to middleweight it was a disaster, it was stupid. It made everything worse."
Jardine's career is one of the most interesting and perplexing puzzles the sport of MMA has ever seen.
Jardine looked spectacular in victories over UFC legend Chuck Liddell, former UFC champ Forrest Griffin and perennial contender Brandon Vera, but seemed like a shell of his former self in recent losses to Luke Rockhold and Roger Gracie.