A left-hander, Cumberland appeared in 110 games over all or parts of six Major League Baseball seasons between 1968 and 1974 as a member of the New York Yankees, San Francisco Giants, St. Louis Cardinals and California Angels.

When he was recalled to San Francisco in September 1970, he reeled off five stellar appearances as a relief pitcher, winning his only two decisions and allowing no earned runs in 92⁄3 innings pitched.

On June 16, he was dealt to the Cardinals, where he worked in 14 games but continued to struggle, putting up a 6.65 ERA as a member of the St. Louis bullpen.

[5] But the Twins released Cumberland on April 10, 1973, and he spent the early part of season back in the Giants' organization at Triple-A Phoenix.

When San Francisco released him on June 30, he signed the following day with the Angels' Triple-A affiliate in Salt Lake City.

After three seasons, including 1983 when 18-year-old phenom Doc Gooden dominated the Carolina loop with a 19–4 (2.50) performance, Cumberland was promoted to Triple-A Tidewater, spending another three years there before he was named the Mets' 1989 minor league pitching coordinator.

He died in Lutz, Florida, at 74, on April 5, 2022, survived by his wife of 52 years, three sons, a brother, a sister, and three grandchildren.