Reyes was optioned to Triple-A Memphis after Saturday's loss to the Padres, Derrick Goold of the St. Louis Post-Dispatch reports.
Manager Mike Shildt talked in spring training of Reyes being used in a multi-faceted bullpen role, but his poor start to the season instead has him headed to the minors to straighten things out. The 24-year-old is one of the most talented arms in the organization but has allowed five runs with a pitiful 1:6 K:BB over three innings thus far in 2019. Reyes could still earn his way into a high-leverage role this season, but he'll first have to illustrate better control at Memphis.