Suarez was optioned to the Giants' alternate training site Saturday, Kerry Crowley of The San Jose Mercury News reports.
Suarez tossed 2.2 scoreless innings Friday after rejoining the major-league club, but he'll head back to alternate camp to bring in a fresh arm in the bullpen as the Giants compete for a postseason spot. The southpaw carries a 3.72 ERA and 1.55 WHIP over 9.2 innings this season.