Cobbins attended Palo Duro High School where, as a junior, he averaged 18.3 points and 10.5 rebounds per game, leading the Dons to the Region I-4A finals.

In his senior season, he averaged 15.1 points and 9.7 rebounds per game, making him a consensus four-star recruit.

[2] A two-time member of the Big 12 All-Defensive Team, Cobbins ranked second in the conference in blocks per game (1.83) during his senior season.

[6] On August 22, 2018, Cobbins was selected by the Capital City Go-Go of the G League in the 2018 expansion draft.

[13] Cobbins joined Stillwater Stars, composed of Oklahoma State alumni, in The Basketball Tournament 2020.