The Giants recalled Jackson from Triple-A Sacramento on Sunday.
Jackson was eligible to return to the Giants less than a week after being demoted since Evan Longoria (hand) was placed on the COVID-19-related injured list in a corresponding move. Over his 15 appearances out of the big-league bullpen this season, Jackson has posted a 3.68 ERA, 1.09 WHIP and 21:6 K:BB in 14.2 innings.