Snider was recalled from Triple-A Omaha on Tuesday.
Snider will rejoin the Royals after Taylor Clarke (oblique) was placed on the 15-day injured list Tuesday. Snider has a 6.82 ERA and 1.67 WHIP over 33 innings out of the bullpen this season. His unimpressive numbers mean he will likely only be used in low-leverage situations as the Royals close out their season.