He spent 2017 with both the AZL Rangers and the Spokane Indians, posting a combined .295 batting average with six home runs and 28 RBIs in 44 games between the two clubs.[9] Whatley began the 2018 season with the Down East Wood Ducks of the High–ACarolina League[10] and was reassigned to the Hickory Crawdads of the Single–ASouth Atlantic League at the end of the season. In 52 games between both teams, Whatley hit .179 with three home runs and 14 RBIs.[11] Whatley was assigned back to Hickory for the 2019 season,[12] hitting .234/.349./321/.670 with four home runs, 49 RBIs, and 29 stolen bases.[13][14] Whatley played in the Arizona Fall League for the Surprise Saguaros following the 2019 season.[15] Whatley was named the Texas Rangers 2019 Minor League Defender of the Year.[16] Whatley did not play in a game in 2020 due to the cancellation of the Minor League Baseball season because of the COVID-19 pandemic.[17]
He spent the 2021 season with the Frisco RoughRiders of the Double-A Central, hitting .203/.316/.282/.598 with four home runs and 14 RBIs.[11] He split the 2022 season between Frisco and the Round Rock Express of the Triple-APacific Coast League, hitting a combined .228/.287/.328/.615 with 4 home runs and 16 RBI.[18] In 70 games for Round Rock in 2023, he batted .203/.290/.322 with 6 home runs, 25 RBI, and 5 stolen bases. Whatley elected free agency following the season on November 6, 2023.[19]
On November 27, 2023, Whatley re-signed with the Rangers organization on a minor league contract.[20]