Aaron Barrett has been knocked down. Not once, but twice. In 2015, in the midst of his second big league season with Washington, the ex-Ole Miss star suffered an elbow injury that required Tommy John surgery. About a year later, while throwing as part of his rehab program, he suffered a broken humerus, the bone in the upper arm. More surgery. More rehab. Two long years later, in June of this year, Barrett finally made it back to the mound in a professional game. Doctors have told him it’s a minor miracle that he can pitch at all. The Nationals, to their credit, have stayed with him. He has made four appearances over the last three weeks for Auburn in the short-season Class A New York-Penn League. It’s a long way from the big leagues, but the 30-year-old Barrett – who has a 3.47 ERA in 90 MLB games — says he is determined to get back. “I keep telling myself that when it’s all said and done, it’s going to be one hell of a comeback story,” he told milb.com.