He's a left back. Plays in Switzerland. Former Argentina youth international. Is he eligible for US? https://www.transfermarkt.us/milton-valenzuela/profil/spieler/422401
No. He played in Columbus for a few seasons and eventually got a green card, but I’ve never read anything about him pursuing US citizenship.
He got a green card in 2019, so he wasn't a citizen then 1146789853176193025 is not a valid tweet id He left the Crew and the United States at the end of 2021, which would not even be close to the time you need to complete the process after the green card.
Maybe he married an American, ala David Regis? Though I think it still takes at least 4 years from marriage to become a US citizen.