A native of Mousie, Kentucky, Conley started two big league games in the closing weeks of the 1958 season.

In his MLB debut, he allowed three earned runs in seven innings of work against the Los Angeles Dodgers but left the game for a pinch hitter trailing, 3–1.

(The Phils rallied to win for reliever Turk Farrell, by scoring three runs in the eighth inning.

)[1] But in his second start, the Chicago Cubs knocked Conley out of the game in the second inning by scoring four runs off him on three singles and a base on balls.

Conley played eight years (1953–60) of Minor League Baseball (MiLB), all but one game spent in the Phillies' organization, and won 68 out of 121 decisions (.562).