"I think it's just something we couldn't trust he was going to be available," Hinch said. "We tried to get him off the mound yesterday, and it wasn't comfortable for him. … We hope it's not going to disrupt him too deep into the season, but we'll get him shut down from throwing a couple of days to calm his back down, and we'll get him back up and running again."
To make room for McCullers on the 40-man roster, the Astros transferred shortstop Jed Lowrie to the 60-day disabled list from the 15-day disabled list. Lowrie had thumb ligament surgery and is out until after the All-Star break.
Deduno has appeared in nine games for the Astros this year and is 0-1 with a 6.86 ERA. He's been used mostly in long relief, though he started two games and was 0-1 with an 11.42 ERA in 8 2/3 innings in that role.
• The Astros traded Minor League left-handed pitcher Chris Lee to the Orioles in exchange for international slots 46 and 76 for the 2014-15 International Pool. Lee was 3-2 in seven appearances (six starts) at Class A Quad Cities this season.
Brian McTaggart is a reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.