"It's in the almost identical spot on the scan, over basically the scar tissue that had built up over that muscle," Reds head trainer Paul Lessard said on Sunday. "It's a small, tiny tear that was healing. He just picked that scab, basically."
The strained right lat cost Cueto almost five weeks from April 15-May 20. His second DL stint lasted from June 5-16 for what was called a right shoulder strain -- but it was essentially in the same area as the first injury.
The plan is to have Cueto shut down from throwing for at least a couple of weeks. There is no timetable for a return yet.
"We'll probably go a little slower this time," Lessard said. "It's probably going to be an issue the rest of the season. We'll have to take some more time. Hopefully the scans show it healing over before we start a throwing program."
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.