From the '70 Game Program

Kittle's Managerial Record in the Astros' System
Year Team League Record Placed
1968 Dallas-Fort Worth Spurs Texas 60 - 79 Fourth and Last
1969 Savannah Senators Southern 59 - 76 6th and Last
1970 Oklahoma City '89ers American Assoc. 68 - 71 Third

Turns out Kittle did NOT put himself into a game for Oklahoma City in 1970, but ten years later, would pitch again. On August 27, 1980, according to BaseballLibrary.com, "Pitcher and coach Hub Kittle becomes the oldest man to play in an organized baseball game when he starts for Springfield (American Association) against Iowa at the age of 63 years and six months. Kittle retires the side in the first inning, then tosses one pitch to retire a batter in the 2nd frame before exiting."