The Indians placed Hagadone on their minor league disqualification list Sunday, one day after optioning him to Triple-A Columbus. The left-hander will be examined by hand specialist Dr. Tom Graham at Cleveland Clinic on Monday.
"This is the result of a self-inflicted injury to his pitching hand," Indians general manager Chris Antonetti said. "We are certainly disappointed in his reaction. We all share his frustration, but wish he had handled it differently."
Antonetti would not reveal details, except to say the injury came after Hagadone had a bad relief outing against Tampa Bay on Friday night. The 26-year-old rookie gave up two hits, walked two and allowed two runs while recording two outs.
Hagadone will not be paid while he is on the disqualified list, but can participate in workouts when he is cleared to do so. Antonetti said his understanding was Hagadone could be kept on the list until the injury heals, though the Indians have been on contact with Major League Baseball regarding the matter.
"This is a unique situation for us, so we're seeking advice on how to handle everything," Antonetti said.
Antonetti said any player could file a grievance over any team decision, but the Indians had not been contacted in that regard.
"He is very remorseful and sorry," Antonetti said. "He could be out a while."
Hagadone's spot on the Indians' roster was taken by lefty Scott Barnes, recalled from Columbus on Sunday.
Hagadone was 1-0 with a 6.39 ERA in 27 relief appearances for Cleveland. He opened the season in Columbus and was recalled April 27 when veteran reliever Rafael Perez went to the disabled list. Hagadone compiled a 0.87 ERA in his first nine outings. He then struggled to command his pitches in the strike zone and gave up 12 runs, 14 hits and seven walks over 5 2-3 innings in his last seven appearances.
Hagadone was considered a key part of the trade that sent All-Star catcher Victor Martinez from Cleveland to the Boston Red Sox at the 2009 trading deadline. The Indians also received right-handers Justin Masterson and Bryan Price.