In 2010 he moved to the youth department of Barcelona, advancing regularly through the ranks and from July 2017 played for Barcelona Juvenil A who that season won their group in the 2017–18 División de Honor Juvenil de Fútbol, but after a quarter-final success were eliminated in the semi-finals by Sporting Gijón A.
[6][7] Comas moved to Switzerland and joined FC Basel's first team for their 2022–23 season signing a four-year contract, until summer 2026, under head coach Alexander Frei.
[14] Comas recovered in time for the beginning of their 2023–24 season under new head coach Timo Schultz.
However he suffered an injury to his left lateral meniscus in match the against Servette on 23 October and was substituted out after just four minutes.
[15] The next day the club announced that the Spaniard underwent successful surgery that morning and that the tear had been stitched.