BJ Penn lost at UFC 137 to Nick Diaz, and informally announced his retirement after the fight. If he does choose to retire, it will mark the end of a legendary MMA career. UFC and MMA fans everywhere should tip their caps to a man who has had an illustrious career and put his stamp on the sport forever as an innovator and pioneer.
If he retires, Penn will finish his career with 16 wins and eight losses. That record doesn't look good at all. The names on his record are all big-time fighters, who have winning records themselves. Penn took no tune-up fights and no easy matchups; he fought guys who were true fighters and martial artists.
Today is a sad day for the sport, and Penn should be remembered as a champion. His highly-decorated career will be remembered forever.
This article will contain five achievements, but don't be fooled, BJ Penn has many significant moments in his incredible career.