Texas Rangers right-hander Colby Lewis will need surgery for a torn ligament in his throwing arm and will likely miss the rest of the 2012 season, ESPN Dallas' Richard Durrett reported Monday.
It's a big blow to the Rangers' rotation, and it could prompt Texas' front office to push toward adding a starter with the trade deadline looming in just more than a week.
The Rangers placed Lewis back on the 15-day disabled list Monday after he felt more discomfort in his throwing arm. The team listed the injury as forearm tendonitis.
The Rangers first put Lewis on the DL because of the injury from June 24 to July 17. He returned and made just one start before feeling more discomfort, and he had to skip a bullpen session over the weekend. Lewis allowed three hits and one run in five innings against Oakland on Wednesday. He notched a no-decision in the Rangers' 4-3 loss that day.
The Rangers also lost starting pitcher Roy Oswalt on Monday, who was scratched from his scheduled start because of back stiffness.