Strasburg will undergo neurogenic thoracic outlet surgery Wednesday and will not pitch again this season, Mark Zuckerman of MASNSports.com reports.
The issue helps explain why Strasburg had multiple setbacks as he attempted to work his way back from a neck strain. The 33-year-old will end the year having made just five starts, not much more than the two he managed last season. The Nationals hope he's able to return around the start of spring training, but a full recovery can't be guaranteed, as thoracic outlet syndrome has had a significant negative impact on the careers of many pitchers, most notably Matt Harvey. Given Strasburg's extensive injury history, it will be difficult to have much optimism about him during draft season.