He was later a minor league baseball manager in the Pittsburgh Pirates and Los Angeles Dodgers organizations.

Forbes made his Major League debut as a defensive replacement for the Orioles at second base in the ninth inning on July 21, 1998 against the Oakland Athletics.

His one hit, the first of his Major League career, was an RBI single to left field in the ninth inning on July 31, 1998 off Jim Pittsley of the Kansas City Royals.

He was sent to the Texas Rangers as part of a conditional deal on May 27, 1999 and played for the Oklahoma RedHawks in 22 games during that season.

After the season, Forbes was promoted and spent 2011 and 2012 as the manager of the Pirates' AA affiliate, the Altoona Curve.