John Metchie III -- one of the Houston Texans' second-round picks in the 2022 NFL Draft -- has been diagnosed with Leukemia ... and will likely miss the entire season while fighting the cancer.
The 22-year-old announced the news on Sunday ... saying doctors have thankfully described it as "the most curable form of Leukemia."
"I am currently receiving great medical care, am in good spirits and I expect to make a recovery at a later point in time," Metchie III added.
The receiver -- who played a huge role for Nick Saban and the Crimson Tide the past two years -- said he will almost certainly have to sit out his rookie season in order to recover.
"My main focus will be on my health and recovery," he said. "Thank you in advance for your support and well-wishes. I cannot wait to come back stronger than ever. God bless."
Metchie III -- who piled up 2,081 receiving yards and 14 touchdowns the last two years at Alabama -- was expected to be a key contributor for the Texans after being selected with the No. 44 overall pick in April.
Get well soon, John!!