Kansas City Chiefs (first stint) Going into the NFL, Fortson converted to tight end and signed with the
Kansas City Chiefs as an undrafted free agent on May 13, 2019. He was waived on August 31, 2019, and signed to the
practice squad the next day. Fortson remained on practice squad for the rest of the season and as the Chiefs won
Super Bowl LIV against the
San Francisco 49ers. He re-signed with the Chiefs on February 5, 2020. He was waived on September 5, 2020. He signed to the practice squad the following day. On February 9, 2021, Fortson re-signed with the Chiefs. He made the Chiefs' active roster on August 31, 2021. He recorded his first career NFL reception against the
Baltimore Ravens in Week 2 of the 2021 season. He was placed on
injured reserve on October 23. He was placed on Reserve/COVID-19 on December 10, 2021. On the season, he appeared in six games and had five receptions for 47 yards and two touchdowns. Fortson appeared in 13 games and had nine receptions for 108 yards and two touchdowns in the 2022 season. After suffering an elbow injury in Week 15 against the
Houston Texans, Fortson was placed on season–ending injured reserve on December 23, 2022. Fortson won his second
Super Bowl when the Chiefs won
Super Bowl LVII against the
Philadelphia Eagles. Fortson, who was an exclusive rights free agent, was tendered by the Chiefs on March 14, 2023. His contract for the 2023 season will be a one-year league minimum contract. He was placed on injured reserve on August 15, 2023 after suffering a dislocated shoulder. Without Fortson, the Chiefs won
Super Bowl LVIII against the
San Francisco 49ers giving Fortson his third Super Bowl championship.
Miami Dolphins On March 15, 2024, Fortson signed with the
Miami Dolphins. He was released on August 25, 2024.
Kansas City Chiefs (second stint) On September 26, 2024, Fortson signed to the Kansas City Chiefs practice squad, and promoted to the active roster a week later. On October 28, 2024, the Chiefs placed Fortson on injured reserve due to a knee injury. ==Career statistics==