The chances of recovery from this kind of surgery to the point where Harrison could pitch again are not good. Harrison was operated on twice by Dossett last year to a repair a herniated disc.
Harrison won 32 games for the Rangers in 2011-12. He also signed a five-year, $55 million contract extension in the spring of 2013. But he has been able to pitch in just six games over the past two seasons while dealing with back problems.
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.