Okert was optioned to Triple-A Sacramento on Thursday, John Shea of the San Francisco Chronicle reports.
The club was choosing between Okert and Neil Ramirez to fill its final spot in the bullpen. Although Okert has experience with the big club -- he posted a 3.21 ERA and 1.29 WHIP over 16 games (14 innings) in 2016 -- Ramirez ultimately got the nod to be on the Opening Day roster. While it's possible that Okert could work his way back up to the majors at some point this season, he'll return to Sacramento for the time being.