Won a silver medal with Team USA at the Tokyo 2020 Olympic Games. Got the start against the Dominican Republic with a spot on the semifinal on the line and was solid on the mound, giving up just two hits in five scoreless innings of work and striking out five batters. After facing the bases loaded in the first inning, he retired 12 of the next 13 batters, including his last nine batters faced. He later made his first appearance as the first base coach in the semifinal game against Korea and once again in the gold medal game.

Earned a silver medal in the COPABE Pan American Junior Championships. Kazmir pitched 13.2 innings in the tournament, posting a 3.95 ERA and striking out a team-best 31 batters.