Rick George is resigning from his post as Texas Rangers president of business operations to become the athletic director at the University of Colorado, the team announced Wednesday.Rangers CEO Nolan Ryan thanked and wished George well in a statement.“We appreciate his many contributions the past few years, particularly his efforts to help us increase revenues and attendance to record levels,” Ryan said. “We have a deep, experienced team in place on the business operations side that is prepared to maintain our strong performance while we look for Rick’s successor.”George was hired by former CEO Chuck Greenberg in October 2010 as chief operating officer. Greenberg resigned in March 2011, but George stayed with the team and was promoted to president of business operations in March this year.But George had shown interest in returning to college athletics. He was one of six finalists for the athletic director job at Ole Miss in early 2012, so it’s no surprise he took the job at Colorado.George worked at Colorado from 1987-91 as an assistant athletic director in football operations. He has also worked at Vanderbilt and the University of Illinois, his alma mater. Before joining the Rangers, George was an executive with the PGA Tour.“The Rangers have not only a great team on the field, but also a great team in the front office under Nolan Ryan’s leadership,” George said in a statement. “I will cherish this experience and the lasting friendships that I have made in my time with the Rangers.”George’s first day at Colorado will be Aug. 12.Briefly• Right-hander Colby Lewis began another rehab assignment Wednesday with Double A Frisco, as he continues to recover from flexor tendon surgery in his right elbow. Lewis allowed four runs on four hits with one walk and one strikeout over 2 2/3 innings. He threw 45 pitches, 27 for strikes, giving up a two-run homer on his final pitch of the night.• Left-hander Brad Mills has left the Rangers organization to pitch in Japan. He spent all season at Triple A Round Rock, going 7-5 with a 3.87 ERA.
Drew Davison, 817-390-7760 Twitter: @drewdavison