After pursuing a pro career as a young boy, Viñas initially ceased his professional aspirations during his teenage years and began delivering meat to make a living.

[3] On 29 August 2019, Viñas joined Mexican side Club América on a one-year loan agreement with the option for a permanent deal.

[6] On 30 May 2020, it was announced that America had exercised their $1.9 million option to sign Viñas on a five-year contract, with the loan move becoming permanent on 1 July.

[7] After falling out of favor with the team during the 2022–23 season, making just four league starts over the course of the campaign, Viñas began attracting interest from clubs across the country.

[14] Viñas played his first game for Uruguay in the CONMEBOL qualifiers coming in as a late substitute for Darwin Nuñez, in their victory over Argentina on 16 November 2023.