Hearn was an undersized post player while at R. Nelson Snider High School, in Fort Wayne, Indiana, and he was lightly recruited by college programs and receive no D-1 scholarship offers.

[1] As a senior, in the 2012–13 season, Hearn averaged 13.4 points and 4.6 rebounds per game, earning Honorable Mention All-Big Ten Conference.

Hearn played for the Stampede for a full season, and part of another, before being traded to the Westchester Knicks,[2] and ultimately landing with the Reno Bighorns.

During the 2016–17 season, Hearn was selected to compete in the three-point contest at the 2017 NBA Development League All-Star Game.

[5] Hearn made his NBA debut on February 5, playing 2:33 in a 111–91 win against the Portland Trail Blazers and making a three point field goal.

[11] In October 2020, Hearn signed with the NBA G League Ignite as one of the veteran players to mentor younger prospects.