On July 2, 2018, Molina signed with the Tampa Bay Rays as an international free agent.
[1] He made his professional debut the following year, logging a 3.23 ERA in 14 games for the Dominican Summer League Rays.
Molina did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.
[3] In 2022, he made 29 appearances split between the Single–A Charleston RiverDogs and High–A Bowling Green Hot Rods, accumulating a 14–2 record and 3.10 ERA with 85 strikeouts in 95+2⁄3 innings pitched.
[5] On December 6, 2023, the Rockies selected Molina from the Rays in the Rule 5 draft.