Career
He was an alumnus of Oklahoma State University. Signed by the Saint Louis Cardinals as an amateur free agent in 1949, Kellert would make his Major League Baseball debut with the Saint Louis Browns on April 18, 1953, and appear in his final game on September 29, 1956. The book Carl Erskine"s Tales from the Dodgers Dugout: Extra Innings (2004) includes short stories from former Dodger pitcher Carl Erskine.
Kellert is featured in a number of these stories.