BALTIMORE -- Right-hander Samuel Deduno was claimed by the Astros from the Twins on outright waivers on Saturday, both clubs announced. The Twins will select the contract of left-hander Aaron Thompson from Triple-A Rochester on Sunday to take Deduno's spot on the roster.
Deduno, 31, pitched mostly in long relief for the Twins this season, making eight starts and 22 relief appearances. The right-hander posted a 4.60 ERA with 74 strikeouts, 41 walks and nine homers allowed in 92 innings. He's fared better as a reliever this season with a 3.21 ERA in 53 1/3 innings compared to a 6.52 ERA in 38 2/3 innings as a starter.
Twins manager Ron Gardenhire said Deduno was informed of the move at the team hotel before Saturday's game against the Orioles.
"He's a classy kid," Gardenhire said. "I just explained to him that if you get picked up on waivers it means somebody wants you. But as he relayed to us, he liked it here and was sad to move on."
Deduno previously served as a starter for the Twins in 2012 and '13, making 15 starts in '12 and 18 last season. His best season came last year, when he went 8-8 with a 3.83 ERA.
He's suffered from control problems throughout his career, but he has cut down his walk rate in recent years. He walked six batters per nine innings in 2012, but he reduced that to 3.4 per nine in '13 and four per nine this year.
Deduno, a native of the Dominican Republic, originally joined the Twins as a Minor League free agent before the 2011 season. He has a career 4.24 ERA with 205 strikeouts, 139 walks and 27 homers in 284 2/3 innings with the Rockies, Padres and Twins. Deduno, who is out of Minor League options, will be eligible for arbitration after next season.
Thompson, meanwhile, had a 3.98 ERA in 46 appearances with Rochester. The left-hander struck out 51 and walked 26 in 52 innings. The Twins now have 38 players on the 40-man roster with his addition.
"We talked about a lefty who could get lefties out," Gardenhire said. "He had a pretty good year down there. He can spin the ball so I think that outweighed the other stuff against other pitchers. Our lefties have had some troubles."
To make room for Deduno, the Astros moved reliever Josh Zeid to the 60-day disabled list.
Rhett Bollinger is a reporter for MLB.com. Read his blog, Bollinger Beat, and follow him on Twitter @RhettBollinger. This story was not subject to the approval of Major League Baseball or its clubs.