[2] Playing for the Lietuvos rytas Vilnius under-18 team, Blaževič won the 2018 EuroLeague Basketball Next Generation Tournament.

[3] On 29 June 2020, Blaževič signed a long-term contract with Žalgiris Kaunas of the Lithuanian Basketball League (LKL) and the EuroLeague.

[6] On 11 July 2024, Blaževič signed a one-year deal with Wolves Twinsbet of the Lithuanian Basketball League (LKL) and the EuroCup.

[7] Blazevic debuted for the Lithuania Men's U-16 Basketball team in the 2017 FIBA Europe Under-16 Championship in Montenegro.

Blazevic played for Lithuania Men's U-18 Basketball team in the 2018 FIBA Europe Under-18 Championship in Latvia.