Jimenez signed a minor-league contract with the Athletics on Thursday, Martin Gallegos of MLB.com reports.
Jimenez was selected by Oakland in the Rule 5 draft last year, but he was returned to the Blue Jays in mid-March. However, he'll rejoin the Athletics after he posted a 2.22 ERA and 1.22 WHIP in 44.2 innings across 39 appearances (one start) at Triple-A Buffalo in 2021.