AJ is currently signed under a professional contract with the Chicago White Sox minor league organization.
Gill heads to the White Sox after having completed his career as a Spartan. In two plus season with the 2020 season ending early due to the coronavirus (COVID-19) pandemic, Gill put up impressive offensive numbers. In 99 games, he hit .335 with a .543 slugging percentage, collecting 121 hits in 361 at bats. Of his 121 hits, 41 went for extra bases with 21 doubles, 14 home runs and six triples. Gill drove in 94 runs while scoring 85 and he also reached base 48 times with a base on ball.
Following the 2019 season, Gill All-Region (Midwest) First-Team outfielder by D3baseball.com and American Baseball Coaches Association (ABCA) and a Northern Athletics Collegiate Conference (NACC) First-Team outfielder. Entering the 2020 season he was named a Second-Team preseason All-American by D3baseball.com. Gill was a cog in the Spartan baseball resurgence to the national scene as the 2018 and 2019 Spartans won NACC tournaments and made NCAA regional appearances. The 2020 team was ranked 17th with a 9-2 record when the season was ended.