Józef Pokorski is known to have started playing with RKS Hajduki, most likely in their youth sides before joining KresyChorzów and playing with the club during the outbreak of World War II. After the war he returned back to Kresy Chorzów before shortly moving to Lechia Gdańsk. At Lechia he became well known for his penaltytaking abilities and scored 5 penalties in playoffs for Lechia. He was among the team in their first ever season in the I liga. With Lechia he made 50 appearances and scored 5 goals in all competitions. After Lechia he had a short spell with Górnik Katowice before returning to the I liga with Lech Poznań, making a further 7 appearances in Poland's top division. After Lech he had spells with GórnikKatowice, Gwardia Słupsk and KS Chełmek before retiring in 1956.