It's official! At least according to this article the inspiration for MMA gloves come from Lee's Enter the dragon scene where they allowed for striking and grappling which was adaptation from his training. The Godfather of MMA, Bruce Lee "It may sound weird, but if you recall the movie “Enter The Dragon (1973)”, you may remember the first-ever mixed martial artist, Bruce Lee wearing strange gloves. Although they were similar to regular winter gloves, this broken-knuckle kempo looking gloves were smaller than boxing 8 oz and the space for the fingers was suitable for grappling, clinching and wrestling. Considering the popularity of the movie and Bruce Lee as an actor, it’s reasonable to believe the creators got their first idea in the movie theater." The inspiration for what we see today.