The Rangers want him to get the elbow cleaned up because the recovery time is two months. They want him back at full strength by Nov. 1 so he can go through a full, normal offseason conditioning program. That's why they had targeted Sept. 1 as the shutdown date.
"It cleared up for the most part after Spring Training," general manager Jon Daniels said. "It bothered him on long throws and hard throws. He was aware of it. We want to get it completely cleaned up."
Choo, who signed a seven-year, $130 million contract as a free agent this offseason, finished his first season with the Rangers hitting .242 with 58 runs scored, 13 home runs, 40 RBIs, a .340 on-base percentage and a .374 slugging percentage. All batting, slugging and on-base percentages were his lowest since he began playing regularly in 2008.
"More than anything, the ankle played a big part early," manager Ron Washington said. "Once that got rolling, he couldn't stop it. In this game when things go south, it's hard to correct."
Washington still suggested that in some ways, Choo had a "strong" first season with the Rangers.
"With all the adversity, he didn't shut it down," Washington said. "He kept fighting. I admire the way he went about his business through all the adversity. It was tough but he didn't complain."
T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, and follow him on Twitter @Sullivan_Ranger This story was not subject to the approval of Major League Baseball or its clubs.