Johnson played in the Texas Rangers, Los Angeles Dodgers, and San Francisco Giants organizations from 2001 through 2003, before signing with the Expos again in 2004.

In 2008, he played for the CPBL's La New Bears and won the winningest pitcher and the MVP at the regular season.

For the 2009 season, he signed to play for the SK Wyverns in South Korea after an interval of four years, but was dismissed in April having appeared in just two games.

He then signed with the Edmonton Capitals of the Golden Baseball League, for whom he finished the season.

He is presently a coaching instructor in Edmonton for the St. Francis Xavier high-school baseball Academy.