Twins right-hander Kyle Gibson, who came to spring training with a realistic shot at making the season-opening rotation, will apparently open the year at Triple-A Rochester instead.

Gibson, 25, headed the list of five players sent back to minor league camp on Thursday morning, March 14.

Also optioned out was lefty reliever Caleb Thielbar, while three more were reassigned: righty reliever Anthony Slama, catcher Kyle Knudson and shortstop James Beresford.

Beresford, who played for Australia in the World Baseball Classic, homered in the eighth inning of a home loss to the Baltimore Orioles on Wednesday night, March 13. He has just one professional homer in 2,113 regular-season at-bats.

Gibson, a 2011 first-round draft pick who has overcome Tommy John surgery, struggled with his command in his first big-league spring training. He made four appearances this spring, including two starts, and posted a 9.00 ERA.