Pythagoras was, according to some reports, the most highly skilled boxer and grappler in the Greek world. He is credited for winnning the Olympic competition at pankration, which was a no holds barred combination of wrestling and boxing.
Unfortunately, unlike Bodhidharma, Pythagoras' school was never established, and his techniques are lost to antiquity.
I have heard that in addition to being a martial artist, Pythagoras did some work with triangles or something like that.