MINNEAPOLIS (AP) — Minnesota Twins right-hander Phil Hughes will miss the rest of the season because of persistent arm trouble related to a condition that required rib removal surgery a year ago.

The Twins put Hughes on the 60-day disabled list Tuesday, and manager Paul Molitor said another operation is possible. Hughes recovered from the thoracic outlet syndrome procedure for a spot in the rotation to begin the season, but he went to the DL after nine starts with a recurrence of shoulder weakness.

Hughes returned as a reliever earlier this month, making five appearances. He was 4-3 with a 5.87 ERA in 53 2/3 innings.

The Twins needed space on the 40-man roster for right-hander Bartolo Colon, who was to start Tuesday night against the New York Yankees.