Borbon was passed over by the Rangers when they announced their September callups on Friday night. Unless there is an injury, Borbon's season will end on Monday when Triple-A Round Rock plays its final game.
Borbon went into Sunday hitting .301 with a .346 on-base percentage and a .432 slugging percentage this season. But the Rangers have gone through an entire season without a significant injury in the outfield. They called up Leonys Martin from Round Rock when first baseman Mitch Moreland was on the disabled list, but he only started 11 games while he was with the Rangers from June 15 to July 30.
"I think we feel Julio had a very good season for us at Triple-A," assistant general manager Thad Levine said. "When we put together our September callup list, he was actively discussed. But given the playing time our outfielders are getting, we decided to call up only one outfielder and Leonys was a little more ahead of him.
"This is the first season that Josh Hamilton and Nelson Cruz have gone through a whole season without injury, and Julio is a casualty of that. We still feel he is good for the depth in our outfield as we go into 2013."
The Rangers probably would have been willing to include Borbon in a trade earlier this season, but did not receive much interest in him. He will be out of options next season, meaning he has to be on the Opening Day roster or exposed to outright waivers.