Alaric Jackson established himself as the Rams‘ starting left tackle the last two seasons, and in February signed a three-year contract that included $35 million in guarantees.
But the fifth-year pro, who began his career as an undrafted free agent, is being treated for blood clot issues, a person with knowledge of the situation said Friday. The person requested anonymity because of the sensitive nature of the situation.
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Jackson, 26, also dealt with blood clot issues in 2022, which caused him to sit out eight games.
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The Rams began organized team activities in May with an established line that included Jackson, left guard Steve Avila, center Coleman Shelton, right guard Kevin Dotson and right tackle Rob Havenstein, who is recovering from shoulder surgeries.
Havenstein’s and Jackson’s conditions have prompted the Rams to add depth at tackle.
After signing veteran free agent David Quessenberry in May, on Thursday they agreed to terms with veteran D.J. Humphries on a one-year contract.
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Humphries, a 2015 first-round draft pick by the Arizona Cardinals, joins a line that also includes swing tackle Warren McClendon Jr.
Humphries, 31, played eight seasons for the Cardinals before sustaining a major knee injury near the end of the 2023 season.
Last season, he played for the Kansas City Chiefs, but he sustained a hamstring injury in his first game back in Week 14 and played in only two regular-season games.
The Rams will conclude their offseason program next week with a minicamp in Maui.
This story originally appeared in Los Angeles Times.