"We're just trying to strengthen our Minor League system," Jocketty said. "If it works out, great. We always like to sign left-handers. It was not meant to be an audition for here."
Rowland-Smith appeared in six games for the D-backs this season and had a 4.91 ERA before becoming a free agent in April. He was picked up by the Blue Jays organization but was released on June 11. Maine had a 5.59 ERA in 50 games for the Cubs and Indians from 2010-12. He was pitching this season for Bridgeport in the independent Atlantic League.
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.