[1] He was a two-time All-League All-Academic selection, and was ranked in the top 500 players nationally by Perfect Game.
[1] Throughout high school he had a 4.4 GPA, and he was a Collegiate Scholar and earned the Golden State Award.
[5] Meckler played college baseball as a walk-on at Oregon State University while majoring in finance.
[5][8] In 2022 with Oregon State he batted leadoff and hit .347/.456(4th in the Pac-12 Conference/.478, leading the conference with 81 runs and 23 doubles, with 12 stolen bases, and 53 walks (3rd) vs. 49 strikeouts in 268 at bats while playing 50 games in left field and seven games in right field.
[14][15] He was then promoted to the Triple–A Sacramento RiverCats of the Pacific Coast League on July 31 where he was 3.7 years younger than the average player, and batted .400/.546/.600 in 25 at bats, playing four games in right field and three in left field before he was promoted to the major leagues.
[14] Baseball America tabbed him the Giants organization hitter with the best strike zone discipline.
[16] On August 14, 2023, Meckler was selected to the 40-man roster and promoted to the major leagues for the first time.