Early years

Pomonis since he was young played football with the children of his neighborhood, at the sandlot behind the Rizoupoli Stadium. In 1959 Kleanthis Maropoulos saw him there suggested that he join the infrastructure departments of AEK Athens. Thus, at the age of 15, little Pomonis joined the club's infrastructure departments and was a member of the youth teams of the AEK that won many Championships in the early 1960s, under the historical director Dimitris Tragos, having teammates sucha as Giorgos Karafeskos, Nikos Sevastopoulos, Stelios Konstantinidis, Giorgos Lavaridis, Stefanos Theodoridis, Lefteris Istorios, Kostas Triantafyllou, Dimitis Liakouris and Michalis Simigdalas.^[2]

AEK Athens

Pomonis was promoted to the men's team earlier than his teammates as he impressed with his abilities. He made his debut in the first team on 12 March 1961 in a 0–0 away draw against Aris, being the youngest player to ever compete with the club. He was a player with great technical skills and competing in the position of the left winger, he caused the admiration of the fans by running up and down the opposing defenses. In December 1967 in the 1–4 away victory over Olympiacos, he continuously dribbled and ridiculed his personal opponent, Orestis Pavlidis and even the attempts by the captain of the team, Andreas Stamatiadis to "admonish" him during the match in order to simplify his way of playing for AEK to reach an even wider dominance instead proved ultimately fruitless. The young Pomonis eventually insisted on humiliating his opponent at all costs, scoring once AEK missed the opportunity for a wider victory against the red and whites and Pavlidis took the decision that the role of referee suited him better, by retiring as a footballer.^[3]

He was one of the main players of the team that won second place in the Balkans Cup in 1967, losing only in the final by Fenerbahçe.^[4] He was also a regular in the squad that reached the quarter-finals of the European Cup in 1969.^[5] On 15 February 1970 he shined at the derby against Panathinaikos at Leoforos Alexandras Stadium scoring the winner at the end of the first half.^[6] He achieved a hat-trick on 13 September 1970 in a Cup match against the lower-tier club Kipoupoli, where they triumphed by winning 20–0.^[7] He scored once in a European match, on 15 September 1971 the goal that opened the score at the 14th minute against Internazionale at San Siro in the 4–1 defeat for the first round of the European Cup.^[8] He had a decisive contribution to AEK winning 2 Championships and 2 Cups. On 4 February 1973, he scored for the last time in the yellow-black shirt in a league match in Kavala at home when he equalized to 1–1 five minutes before the end. He played his last game for AEK at Peristeri Stadium on 20 May 1973 in the away win against Atromitos.^[2]

Later career

In the summer of 1973, he left AEK and played for a season at Ethnikos Piraeus,^[9] where he ended his career as a professional footballer.^[10] In the summer of 1974 he was transferred to the team of Saronikos, as a veteran he competed in the amateur local championship of Piraeus.^[11]