McGee was promoted to the MLB for the first time on September 14, 2010.[8] He made his MLB debut that night against the New York Yankees, walking three batters and striking out Derek Jeter for his first MLB strikeout.[9] McGee made the Rays MLB roster after spring training in 2011, but he was sent down to the team's Class AAA minor league affiliate after 11 appearances.[10]
In the last few months of the 2014 season, McGee became the Rays' closer. He finished the season with 19 saves. After undergoing elbow surgery to remove "loose bodies" in December 2014, McGee spent the early portion of the 2015 season with the Class AAA Durham Bulls.[11] He underwent knee surgery for a torn meniscus in late August, ending his season.[12]
Colorado Rockies
On January 28, 2016, McGee and Germán Márquez were traded to the Colorado Rockies for Corey Dickerson and Kevin Padlo.[13] McGee had a 4.73 ERA in the 2016 season. McGee and the Rockies avoided salary arbitration on December 3, 2016, by agreeing to a $5.9 million contract for the 2017 season.[14] In 2017, McGee had an 0–2 win–loss record, a 3.61 ERA, and three saves in 62 games.[15]
McGee signed a three-year, $27 million contract with the Rockies after the 2017 season.[15] In 2018, McGee posted a career-worst 6.49 ERA in 61 games.[16] McGee spent time on the disabled list in 2019, posting an ERA of 4.35 in 45 games.[16] McGee was released by the Rockies on July 17, 2020.[17]
Los Angeles Dodgers
On July 21, 2020, McGee signed a one-year contract with the Los Angeles Dodgers.[18] In the pandemic shortened season, he appeared in 24 games with a 3–1 record and 2.66 ERA.[16] McGee allowed one run in 1+1⁄3 innings over three games in the 2020 NLCS and pitched one scoreless inning in the 2020 World Series as the Dodgers won the championship.[16]
San Francisco Giants
On February 17, 2021, McGee signed a two-year contract with the San Francisco Giants worth $7 million, with a club option for the 2023 season.[19] McGee was named National League Reliever of the Month for July 2021, after not allowing a run in 11 innings and recording seven saves.[20] He finished the 2021 season with 31 saves in 36 chances, as well as a 2.72 ERA and a 0.91 WHIP.
In 2022, McGee made 24 appearances for San Francisco but struggled to a 7.17 ERA with 11 strikeouts and 3 saves in 21.1 innings pitched. On July 9, 2022, McGee was designated for assignment after Luis González was activated off of the injured list.[21] On July 14, McGee was released by the Giants.[22]
Milwaukee Brewers
On July 22, 2022, McGee signed a one-year contract with the Milwaukee Brewers.[23] On August 7, 2022, McGee was designated for assignment.[24]
Washington Nationals
On August 9, 2022, McGee was claimed off waivers by the Washington Nationals.[25] On September 9, McGee was designated for assignment. He was released on September 11, 2022.
McGee announced his retirement from professional baseball on February 3, 2023.[26]
Personal life
Jake and Morgan McGee have been married since December 2009. As of late 2015, they live in Tampa, Florida. For the last several years, the couple has purchased Christmas presents for foster children in Reno and Tampa.[27]