By Andrew Gould Pittsburg State head coach Kim Anderson announced his retirement on Tuesday. Anderson began his coaching career in 1982 as an assistant with Missouri, his alma mater. Twenty years later, he commenced another 20 years as a head coach. He expressed his gratitude to everyone within the Pittsburg State program on Twitter. “It has been a great ride and I am extremely thankful for having had the opportunity to coach Gorilla basketball,” Anderson wrote. “Special thanks to all the players, Assistant Coaches, student assistants, trainers, and administrators for making my time in Pittsbu…