IIRC, Steven Ho was the second Donatello, after they gave Ernie Reyes Jr. a role as the pizza guy in TMNT 2.
He was also Liu Kang's brother in Mortal Kombat, the one who gets killed by Shang Tsung right at the start.
He's a regular on Conan O'Brien's show, putting the poor man through some only slightly homoerotic training...
"I have a high art: I hurt with cruelty those who wound me." (Archilochus)