Gibson then finished the season with three starts, no decisions and a 1.72 ERA for Triple-A Rochester.
"He's been very level-headed and business-like," said Eric Rasmussen, Minnesota's minor league pitching coordinator. "He's doing what he's supposed to be doing. He's progressing real nice.
"His biggest strength is he pitches downstairs real well. He keeps the ball down. His fastball is smooth. He's a pretty good pitcher."