When they let Moose, Grandal, Thames, Aguilar, Davies and Grisham all go since the 2019 deadline and Braun possibly finished, their roster has been decimated to the point that it's at best a .500 team and years away from contending. Trading one of their most valuable trade pieces for actual major league talent in return might improve the team. The most promising group in their system is starting pitchers. We don't really know how close to the majors Small, Kelly etc. are, but when he was drafted, Small was considered one of the most advanced pitchers in the draft. Maybe you hold on to Woodruff another year but he'd be in great demand as he's reaching his arbitration years. Hader seems to be the guy who could bring back a nice package but Woodruff is the other option if they are really looking to acquire an impact bat via trade.