Two former Alabama high school standouts returned to NFL rosters on Friday and started training-camp work in preparation for next week’s preseason openers.

Auburn alumnus Marlon Davidson signed with the Houston Texans, and Alabama State alumnus Keenan Isaac signed with the Cleveland Browns. A defensive tackle, Davidson played at Greenville High School, where he was Alabama’s Class 5A Lineman of the Year in 2015. A cornerback, Isaac played at Midfield High School.

Davidson spent the 2024 NFL season on injured reserve. He sustained a torn biceps while working with the Tennessee Titans in a joint preseason practice with the Seattle Seahawks.

Isaac’s 2024 season got off to a convoluted start, but he comes to the Browns after starting eight games and intercepting two passes for the United Football League’s Houston Roughnecks in 2025.

After Isaac played in two games as an undrafted rookie for Tampa Bay in 2023, the Bucs cut Isaac when they reduced the preseason roster to the regular-season limit on Aug. 27. He landed with Carolina as a waiver claim, but on the eve of their season-opener, the Panthers waived the cornerback. On Sept. 10, the Buccaneers re-signed him for their active roster. Tampa Bay then waived Isaac on Sept. 20, signed him for the practice squad on Sept. 24 and promoted him to the active roster on Oct. 15 before waiving him again on Nov. 12 after he had played in five games.

The Las Vegas Raiders signed Isaac for their practice squad on Nov. 20, but he did not play again in the 2024 season.

Davidson has played in five games over the past three NFL seasons.

A second-round selection of the Atlanta Falcons in the 2020 NFL Draft, Davidson played in 19 games, started one and missed 15 as injuries and COVID-19 kept him off the field. He totaled 29 tackles, with one sack, one tackle for loss and one interception returned for a touchdown.

In 2022, Davidson began the season on injured reserve after suffering a knee injury in training camp before Atlanta released him on Oct. 25, 2022.

Davidson returned in 2023 as he went through the offseason program, training camp and preseason with San Francisco before starting the season on the 49ers’ practice squad. San Francisco released Davidson on Oct. 4, and the Titans him for their practice squad on Oct. 25, 2023 — exactly one year after his release by Atlanta.

Davidson played in Tennessee’s final five games and recorded 10 tackles, one sack and two tackles for loss.

The Texans begin their three-game preseason schedule on Aug. 9 against the Minnesota Vikings. The Browns begin their three-game preseason schedule on Aug. 8 against the Carolina Panthers.

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Mark Inabinett is a sports reporter for Alabama Media Group. Follow him on X at @AMarkG1.