There’s plenty of uncertainty surrounding how the Boston Red Sox will fill out their bullpen but one of the biggest question marks heading into next season relates to a pitcher who is already on the roster. Tyler Thornburg has as much to prove as anyone as he works his way back from a pair of lost seasons.
The Red Sox acquired Thornburg in a regrettable deal that cost them emerging infielder Travis Shaw, who has since flourished with the Milwaukee Brewers. Thornburg missed the entire 2017 season while recovering from surgery to treat thoracic outlet syndrome.