Born in Los Angeles, California, Cram appeared in 23 games over parts of four seasons in Major League Baseball with the Kansas City Royals (1969, 1976) and New York Mets (1974–1975), compiling an 0–3 record and 2.98 earned run average.

After his second year in pro ball—when Cram won 16 games in the Class A Carolina League—he was selected by the Royals with the 54th pick in the 1968 American League expansion draft.

He appeared in five games, two as a starting pitcher, and although he lost his only decision to the Seattle Pilots, the league's other expansion team, on September 15, he allowed only four hits and one earned run in seven innings pitched.

Again, he lost his only decision (on August 28 to the Houston Astros), but on September 11, he performed admirably in what would become the second-longest game in MLB history, a 25-inning contest against the St. Louis Cardinals at Shea Stadium.

All told, he dropped all of his three MLB decisions, but posted a solid 2.98 ERA in 481⁄3 innings of work, allowing 52 hits and 13 bases on balls, with 22 strikeouts.