The Giants optioned Beck to Triple-A Sacramento on Wednesday.
The right-hander tossed two innings and 27 pitches in relief during Tuesday's 6-3 loss to the Nationals, so he might not have been available for Wednesday's series finale. As a result of his recent usage along with the fact that he had a minor-league option remaining, Beck ended up giving his spot in the bullpen and on the active roster to Reiver Sanmartin (hip), who was reinstated from the 60-day injured list.