Álvarez plays American football since he was a kid, where he earned the nickname "Pewee" for his small and thin complexion.

[2][3] Álvarez became one of the top players of the ONEFA's Northern Conference and was fundamental part of the 2009 Lobos UAC team that won that year's championship after defeating Águilas UACH 31–24 in the final.

[2] In 2016, Álvarez was one of the first players to be signed by the Dinos de Saltillo of the Liga de Fútbol Americano Profesional (LFA), Mexico's top American football league, ahead of the 2017 LFA season, Dinos' debut season in the league.

[2][6] In 2017, Álvarez helped the Dinos to reach the Tazón México II, LFA's championship game, in the team's maiden season.

[12] Álvarez was signed to the practice roster and made his CFL debut on 15 June 2019 against the Winnipeg Blue Bombers.