Donald K. Walker (born January 4, 1980) is a former professional American mixed martial artist.
Walker began his MMA career competing mostly in regional promotions across the midwest with most of his bouts occurring in the featherweight division against notable opponents Jeff Curran and Cub Swanson.
[2] Walker tried out for the fourteenth season of The Ultimate Fighter, making it to the interview round, but was not selected.
He made his promotional debut against fellow newcomer Jeff Hougland on July 2, 2011, at UFC 132.
Walker faced Ken Stone on September 17, 2011, at UFC Fight Night 25.