As a reliever in the Cardinal organization from 1965 to 1967, Robertson posted no
ERA higher than 1.98. Chosen to be an original 1969 Expo, he went 5-16.
(JCA)
FROM THE BASEBALL CHRONOLOGY
»June 8, 1969: The Expos snap a 20-game losing streak as Jerry Robertson wins his first ML game, 4–3 at Los Angeles. Rusty Staub and Mack Jones homer for the Expos, who end their losing streak three short of the record.