He also played in the Minnesota Twins organisation, who signed him as a non-drafted free agent in 2004.

Going 2–0 with seven saves and a 2.09 earned run average (ERA) and 42 strikeouts over 38.2 innings pitched earned him a Midwest League All-Star selection, and a promotion to the Twins' advanced-A affiliate in Fort Myers.

[2] In 2010, Williams reached the double-A level of the Twins organization, splitting the season between Fort Myers and the New Britain Rock Cats.

After the 2010 season, Williams left the Twins organization to return to his native Australia.

This biographical article relating to an Australian baseball figure is a stub.