[Dr. Ursus]

One of the bounty hunters was played by the actor,who played
Uncle Leo on Seinfeld.

[NFHale]

Len Lesser played Uncle Leo on Seinfeld. He was indeed one of the bounty hunters.

He also played Sgt Bellamy in Kelly’s Heroes. He had a huge movie and TV career. http://www.imdb.com/name/nm0504335/

He died back in February 2011, 88 years old.