Walters has experience in the Chicago White Sox and Oakland A’s organizations, reaching the Single-A level for both.

He spent the 2013 season in Wichita and finished with a 6-1 record, a 3.52 ERA, and 47 strikeouts in 38.1 innings pitched in 50 games.

Walters has a minor league career 24-17 record with a 3.03 ERA and 419 strikeouts in 380.1 innings pitched in 349 games.

He played independent minor league baseball the past four seasons in the Frontier League and the American Association.