Giants optioned RHP Spencer Bivens to Triple-A Sacramento.
Bivens loses his spot on San Francisco’s active roster with former top prospect Kyle Harrison returning from the injured list to take the ball on Saturday against the Guardians. The unheralded 30-year-old righty looked pretty sharp in a handful of appearances for the Giants, posting a sparkling 2.65 ERA, 1.12 WHIP and 16/5 K/BB ratio across 17 innings (seven appearances, one start). He figures to be back in the majors in a couple weeks as a versatile swingman.