Oldham was signed by the Redlegs out of San Jose State in as a pitcher. He spent that season with the
minor league Columbia Reds of the
South Atlantic League. In , he pitched for the
Seattle Rainiers of the
Pacific Coast League, where he had a record of 9–6 and an
earned run average of 3.84. He then served for a few months in the United States Navy. Despite not appearing in a single minor league game in 1956 (due to an injury), the Redlegs called Oldham up in September. On September 2, 1956, he entered the game against the
Chicago Cubs with two out in the third inning at
Crosley Field in
Cincinnati as a
pinch runner for
Ted Kluszewski, who himself had
pinch-hit for
third baseman Alex Grammas. The next batter popped out and Oldham was replaced on defense by
Rocky Bridges. Although he pitched for three more seasons in the minors, his MLB career was over. Oldham batted right and threw left-handed, which was itself unusual: , only 553 players in MLB history (about 3% of all players) hit right and threw left. ==Coaching==