She spent two years there, after which she had two-year stints in both Class A and Double-A, becoming the first woman to umpire at those levels, before being promoted to Triple-A baseball in the Pacific Coast League.
Beavers manager Lee Elia was ejected for arguing a called third strike, and subsequently threw a chair onto the field before leaving the dugout.
[5] Although often considered a prospect for major league umpiring, Pam Postema never received the call until in 1988, when Baseball Commissioner Bart Giamatti offered her a contract to officiate at the MLB level during spring training.
In 1987, Giamatti also offered her a chance to umpire at the "Hall of Fame Game" between the New York Yankees and the Atlanta Braves.
Following her umpiring career, she worked as a trucker, a factory worker, and later a welder, but quit in order to take care of her father, who was afflicted with Alzheimer's disease.