Jiménez signed with the Toronto Blue Jays as an international free agent on August 6, 2015.[1] He spent the 2015 season with the Dominican Summer League Blue Jays, going 1–0 with a 5.19 ERA over 8+2⁄3 innings. He split the 2016 season between the DSL and the Rookie-levelGulf Coast League Blue Jays, going a combined 3–2 with a 2.72 ERA over 46+1⁄3 innings in which he struck out 48 batters.[2] He split the 2017 season between the GCL and the Low–AVancouver Canadians, going a combined 2–3 with a 5.49 ERA over 19+2⁄3 innings in which he struck out 24 batters.[3]
Jiménez spent the 2018 season with the Single–ALansing Lugnuts, transitioning to being a full-time relief pitcher, going 6–2 with 13 saves and a 3.84 ERA and 80 strikeouts over 63+1⁄3 innings (averaging 11.4 strikeouts per nine innings).[4] He split the 2019 season between the High–ADunedin Blue Jays and the Double‑ANew Hampshire Fisher Cats, going a combined 7–3 with 10 saves and a 2.59 ERA and 90 strikeouts over 59 innings (averaging 14.2 strikeouts per nine innings).[4]
San Francisco Giants (2020)
On December 12, 2019, Jiménez was selected by the San Francisco Giants in the 2019 Rule 5 draft.[5][6] He made his major league debut on July 23, 2020, pitching a scoreless 1⁄3 inning against the Los Angeles Dodgers. In two games, he faced eight batters and allowed one run and three walks in 1+1⁄3 innings pitched. Jiménez was designated for assignment by San Francisco on July 30.[7]
Toronto Blue Jays (2020)
On August 2, 2020, Jiménez cleared waivers and was returned to the Toronto Blue Jays organization.[8] He did not play in another game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.[9]
Oakland Athletics (2020)
On December 10, 2020, the Oakland Athletics selected Jiménez in the second round of the Rule 5 draft.[10] He struggled to a 6.00 ERA with three strikeouts in three innings pitched across three spring training appearances.[11]
Toronto Blue Jays (2021)
On March 15, 2021, Jiménez was again returned to the Toronto Blue Jays organization and invited to spring training as a non-roster invitee.[12] Jiménez spent the 2021 season with the Triple-A Buffalo Bisons. In 39 appearances for Buffalo, he went 3-3 with a 2.22 ERA and 79 strikeouts and 3 saves in 44+2⁄3 innings of work. On October 5, Jiménez elected free agency.[13]
Oakland Athletics (2022-present)
On November 4, 2021, Jiménez signed a minor league deal with the Oakland Athletics.[14] On April 7, 2022, the A's selected Jiménez's contract, adding him to their Opening Day roster.[15] He made 34 appearances for Oakland in 2022, posting a 3-4 record and 3.41 ERA with 34 strikeouts and 11 saves in 34.1 innings pitched. His season ended on August 27 when he was placed on the injured list with a right shoulder strain.[16]
He made 7 appearances for Oakland in 2023 before he was placed on the 60-day injured list with a right shoulder strain on April 19, 2023.[17] On August 5, Jiménez was activated from the injured list.[18]