The Boston Red Sox are sending Eduardo Rodriguez to Triple-A Pawtucket after he allowed nine runs in less than three innings against the Tampa Bay Rays.
Rodriguez made his season debut about a month ago after beginning the season on the disabled list.
"Felt like he was back to a place after his start five days ago that would carry him through," John Farrell said. "They bunched a number of hits together. They squared up a number of pitches tonight. It was disappointing."
Rodriguez went 10-6 with a 3.85 ERA in 21 starts as a rookie last year.