From 2007 to 2011, he set one American record and made two Olympic teams. But since 2012, Hall has struggled with injuries and fatigue.
Ryan Hall made the decision to step away from competitive running (You can read his blog here on reasons for doing so) and will be missed by many.
33 year old Ryan Hall, the fastest marathoner in American history and the only United States athlete to break one hour for the half marathon, announced his retirement from competitive running on Friday.
Ryan was a 2008 and 2012 Olympian, will not race at the 2016 U.S. Olympic Marathon Trials on February 13 in Los Angeles. Since 2012, he has suffered a number of injuries and health problems that have interrupted the progress of a running career that made history and many believed held even greater promise.
Read more at blog.ryanandsarahall.com.