The Giants optioned Tidwell to Triple-A Sacramento on Wednesday.
San Francisco swapped Tidwell out of its bullpen in favor of a fresh arm in right-hander Gregory Santos, who was called up from Sacramento. Tidwell appeared in eight games during his month-long stint in the majors, pitching to a 3.00 ERA, 1.08 WHIP and 10:3 K:BB in 12 innings. The right-hander could get stretched back out for a starting role at Sacramento.