Vargas played for the Chicago American Giants for one season in 1948, in which he was named a Negro League All-Star.

[2] Vargas was among the first ten Puerto Rican ball players to debut in MLB, making his first appearance for Milwaukee on April 17, 1955, the same day as fellow Boricua Roberto Clemente did it with the Pittsburgh Pirates.

[3] Vargas was origianally considered Black and not Puerto Rican, which excluded him from playing in the Majors until Jackie Robinson broke the color barrier.

[4] He made 25 relief appearances for the Braves, allowing 23 earned runs on 39 hits and 14 walks for an 8.76 ERA, while striking out 13 in 24⅔ innings of work and did not have a decision.

[6] He played four years in the Mexican League as well as winter baseball at Puerto Rico between 1947 and 1961, while representing his country several times in the Caribbean Series tournament.