Sullivan was recalled from Triple-A El Paso on Tuesday.
Before being optioned to Triple-A after losing the battle for a backup catcher spot to Kyle Higashioka, Sullivan logged seven hits in 25 spring training at-bats. The catcher has gotten off to a great start in Triple-A this year, slashing .472/.500/.722 in 38 plate appearances. In a corresponding move, Graham Pauley was optioned to Triple-A El Paso.