I have seen MMA plenty. And I don't think Bruce Lee is your standard martial artist. He defeated one of the greatest competetive martial artists in 10 seconds. Bruce Lee was one of the greatest martial artists of all time, where as Tyson was a one-trick pony.
Tyson hit harder than most people in the business. He usually won with a first-round knockout. Real boxers who jabbed Tyson, and really outboxed him, had no problem with him. A few idiots didn't take Tyson seriously and got knocked out.
I seriously doubt Lee would allow Tyson the opportunity to swing on him.