|Intro||Slovene basketball player|
|Is||Athlete, Basketball player|
|Birth||12 June 1997, Ljubljana, Ljubljana City Municipality, Slovenia|
|Stats||Height:197 cm Weight:85 kg|
|Sports Teams||KK Union Olimpija|
Blaž Mesiček (born June 12, 1997) is a Slovenian professional basketball player for Mega Bemax of the Basketball League of Serbia and ABA League. Born in Ljubljana, Slovenia, he is a 1.97 m (6 ft 6 in) tall Shooting guard.
He played for his hometown team LOGO Grosuplje and in the summer of 2013 moved to Slovenian powerhouse Union Olimpija where he played for the U-17 and U-19 teams. For the 2014–15 season, he was on loan with Slovenian second-tier club Škofja Loka. He was the best player on the team and one of the best scorer of the league, tallying 21.1 points per contest.
In the summer of 2015, he signed a pro contract with Union Olimpija and received quality minutes in the Adriatic League and the FIBA Eurocup. He was recognized by FIBA and attended the FIBA European U18 All-Star Game during the European Championship 2015 in Lille, France as one of the best 24 young players.
In December 2016, Mesiček signed with Enel Basket Brindisi of the Italian top tier Lega Basket Serie A (LBA).
On August 9, 2018, He signed a two-year contract with Petrol Olimpija. In December 2018, he parted ways with Petrol Olimpija
On January 30, 2019, Mesiček signed a 30-days contract with Pistoia Basket 2000.
After the short stint in Italy, he signed for the Serbian team Mega Bemax for the 2019–20 season in October 2019.