In 1986 Comas joined Boca Juniors where he improved his goalscoring ratio, scoring 63 goals in 127 games in all competitions. Despite of having played only 4 years for the Xeneize, he was the 2nd topscorer of 1986-87 season with 19 goals. Comas formed a remembered attacking line with right-winger Alfredo Graciani and centre-forward Jorge Rinaldi.
In 1989 Comas joined Mexican side Veracruz, where he became a fan favourite after being the top scorer for the 1989-90 season. He played for the "Tiburones Rojos" until 1994 when he returned to Argentina and his first club; Colón de Santa Fe.
After retiring as a player Comas has become a striking coach with several Mexican clubs including Celaya, León, Cruz Azul and Veracruz.