[4] As a senior, Kelley averaged 15.9 points, 12.4 rebounds, 7.8 blocks, and 2.4 assists per game and was named PacWest Player of the Year.

In his sophomore season, he averaged 9.9 points, 7.5 rebounds and 4.6 blocks per game and was a Northwest Athletic Conference All-Defensive Team selection.

[7] At Lane CC, Kelley was recruited by multiple Pac-12 programs and chose to continue his career at Oregon State because he wanted to stay close to home.

[8] On December 17, 2018, as a junior at Oregon State, Kelley tallied a school-record nine blocks, to go with 10 points and nine rebounds, in an 82–67 victory over Pepperdine.

[12] Kelley finished his senior season averaging 11.1 points, 5.3 rebounds and 3.45 blocks per game, earning Pac-12 All-Defensive Team honors for a second time.

[13] Despite the Pac-12 Tournament being cancelled due to the coronavirus pandemic, Kelley finished with 211 blocks in two years at Oregon State.

[29] He made his NBA debut the next day against the Washington Wizards, scoring 1 point and grabbing 4 rebounds in a blowout win.

His mother, Shandel Howell, had intended to play the same sport for Utah State before its women's program was cut by the university.