The average age of Hajduk players who played the first 18 out of 36 rounds is 24.1 years. The youngest team in HT First League is Rudeš (22.2) and they are followed by Istra 1961 (22.6) and Lokomotiva (23.5).

The oldest team is Gorica (players who played First League matches) and their average age was 26.2 years. The remaining teams were of the following average age: Slaven Belupo (25,8), Rijeka (25,4), Dinamo (25,1), Inter-Zaprešić (24,6) and Osijek (24,4).

The youngest team of Hajduk played the last round before the winter break, the recently played derby against Dinamo at Maksimir (1:0) and the average age of the players was 22.8. The oldest teams of Hajduk played the round one against Osijek (4:1), when their average age was 25.1 years, while in the last match against Slaven Belupo at the end of November, their average age was 25 years. In the last three matches, Hajduk's average age was 23, then 23.8 and finally 22.8.