Blatt was born in Netanya, Israel. He played for Hapoel Lev Hasharon youth team, where led his team to win the state cup in 2012, alongside his teammate Roi Huber. In July 2012, Blatt joined the Wingate Institute youth academy.
On August 27, 2014, Blatt started his professional career with Hapoel Tel Aviv, signing a four-year deal. In his first season with Hapoel, Blatt was loaned to A.S. Ramat HaSharon of the Israeli National League, where he averaged 9.7 points, 4.1 assists and 2.5 rebounds per game. In his third season with Hapoel, Blatt made a breakthrough season averaging 7.4 points, 5.4 assists and 2.2 rebounds per game, earning a spot in Hapoel's starting lineup. On April 18, 2017, Blatt participated in the 2017 Israeli League All-Star Game.
On July 13, 2017, Blatt signed a two-year contract with Hapoel Holon. On November 12, 2017, Blatt recorded a career-high 22 points, shooting 6-of-10 from three-point range, along with five rebounds and five assists in a 104–74 blowout win over Maccabi Rishon LeZion. On December 5, 2017, Blatt recorded a double-double with a career-high 13 assists and 12 points in a 94–90 win over EWE Baskets Oldenburg. He was subsequently made the Champions League Team of the Week. Blatt helped Holon to win the 2018 Israeli State Cup, as well as reaching the 2018 Israeli League Final. In 54 games played during the 2017–18 season, he averaged 6.4 points and 4.6 assists per game.
Hapoel Jerusalem (2018–present)
On July 4, 2018, Blatt signed a two-year deal with Hapoel Jerusalem, joining his former head coach Oded Kattash. On December 26, 2018, Blatt recorded a season-high 21 points, shooting 6-of-13 from the field in a 94–74 win over his former team Hapoel Holon. On May 4, 2019, Blatt was named the Champions League Best Young Player.
National team career
Israeli junior national team
Blatt was a member of the U-16, U-18 and U-20 Israel national teams. In July 2015, Blatt helped the Israeli under-18 national team to reach the 2015 FIBA Europe Under-18 Championship Division B Final, where they eventually lost to Sweden and earned a silver medal. Blatt averaged 9.4 points, 4.1 rebounds and 4.8 assists per game. On September 18, 2015, Blatt participated in the FIBA European U-18 All-Star Game in France, recording six points and six assists. In July 2017, Blatt led the Israeli under-20 national team to reach the 2017 FIBA Europe Under-20 Championship Final, where they eventually lost to Greece. Blatt set FIBA U20 all-time record in assists per game with 10.1 and also averaged 16 points, 4.6 rebounds and 1.3 steals per game. Blatt earned a spot in the All-Tournament Team.
Blatt's father, David, is a former professional basketball player and current head coach. His cousin, Golan Gutt, is a current professional basketball player for Ironi Nes Ziona.
