[1][2] He earned a scholarship to the University of Kansas and while attending there he was signed by the Los Angeles Dodgers as an amateur free agent in 1962.

Pitching in relief of starter Aubrey Gatewood against the Boston Red Sox, Kelso entered the game in the fifth inning and struck out the first batter he faced, Frank Malzone.

In 2.2 innings, he game up no runs and one hit with two strikeouts and three walks in the 4-3 Angels loss at Dodger Stadium.

[2] After his playing career ended, Kelso was a scout for 29 years with teams including the Angels, Philadelphia Phillies and Houston Astros.

[4] He was a 2005 inductee of the North Kansas City High School Alumni Hall of Fame.