Gary:
Yes of course, but American blacks also tend to dominate their African cousins in every sport except sprinting.
The African-American enjoys certain benefits coming from the great deal of cross-breeding with Aryans. When you combine the quick, lean, and long-limbed African type with the size, strength, and endurance of the European type, you will often produce a good athlete. The natural genetic bottleneck of the Middle Passage couldn't have hurt matters. Not that I favor race mixing, with intelligent discipline in breeding Whites could produce uber-athletes simply using the genetic variety we already possess.
"I have always kind of wondered if a tribe of white warriors straight out of the medieval-age(Scotland-Braveheart) had met on a battle field with a group of the finest African warriors"
My research indicates that Blacks may enjoy slight physical advantages outside of the cultural in Queensbury rules boxing, such as longer arms, thicker skulls, thicker facial flesh, and a slight advantage in hand speed during gross motor actions like punches, due to slightly higher percentages of Type Ia muscle fibers. This of course purely coincidental. In human evolutionary history, it is also incindental, since pure boxing is barely relevant at all to the true nature of mortal human combat through the centuries. The barely-humanoid Australopithicus was picking up gazelle femurs and whacking his enemies with them one million years ago. Human conflict has largely been armed conflict, with such practical supplimental unarmed systems that arose more commonly resembling MMA than boxing. Haven't you noticed that nearly every ancient martial culture has a form of wrestling-and not pure boxing-as the primary unarmed art complimenting weapon skills?
Whites on average tend to be notably superior in sports that involve manipulating tools and throwing objects-obviously related to primitive weapons skills. As fencer, I can tell you that the "black take-over" of fencing that the pundits predicted the half-Japanese Peter Westbrook would lead has never come to fruition. He was excellent, but never the "world champion" as it were, and despite giving his world class training away to ghetto blacks, his best students have never medaled at the Olympics. As a fencer and student of several ancient and modern weapon styles, this not surprise. Though it may seem counter-intuitive, in weapons handling, reaction time (where Whites exceed blacks by approximately the same average amount they exceed them in intelligence) and the manual dexterity nessecary to manipulate a weapon in a tight, skilled, effecient manner, especially under emotional stres, are more important than pure fast twitch speed. So there are definite reasons why Whites tended to devestate other races in close combat, without referring to emotional intangibles.
Oh yes...I trust I need not mention who dominates shooting and MMA fighting as further evidence?