From the '66 Game Program

McGaha's Managerial Record in the Astros' System
Year Team League Record Placed
1966 Oklahoma City '89ers Pacific Coast 59 - 89 6th and Last
1967 Oklahoma City '89ers Pacific Coast 74 - 74 Fourth

McGaha was replaced at Oklahoma City for 1968 by Cot Deal, and McGaha moved on to Houston, where he coached through the 1970 season