Unable to translate the offensive prowess he had in college to the NBA due to a shoulder injury called thoracic outlet syndrome (TOS), he is considered by many to be a draft bust.

[4] He was overlooked due to his awkward gait, having the appearance of "Bambi"; as assistant coach Cory McCrae explained, "He was long and lanky, and he’d walk and his knees would be hurting".

[4] Assistant coach Raphael Chillious of the Washington Huskies was the first to notice Fultz's potential, describing him as an athlete with the makings of an NBA All-Star-caliber player if he continued to grow.

[5] As a starter for DeMatha's varsity team, he averaged 16.8 points, 7.9 rebounds, and 4.3 assists per game and was named the Player of the Year in the highly-competitive Washington Catholic Athletic Conference.

[6] Among the highlights of his junior campaign were the game-winning foul shots he made in a 16-point performance while being guarded by Jayson Tatum of Chaminade and the triple-double he posted in a matchup against Roselle Catholic at the Hoophall Classic.

[17] Sources: The Washington Huskies were fully expecting to open the 2016–17 season with Dejounte Murray and Marquese Chriss; instead, however, both freshmen were selected in the first round of the 2016 NBA draft.

[20] A player who "jumps off the page athletically and possesses creative scoring instincts and playmaking skills", the consensus among sports analysts was that Fultz would be the first overall pick in the 2017 NBA draft.

[22] The 76ers, after years of mediocrity, had lofty expectations of returning to the playoffs for the first time since 2012; such were the high hopes that rested on their new core consisting of Fultz, Joel Embiid, and Ben Simmons.

[23] In his first regular season game, on October 18, the rookie posted 10 points, 3 rebounds, and 1 assist in 18 minutes of play coming off the bench.

"[28] During his hiatus, Fultz's basic shooting mechanics appeared to change under a trainer from outside the 76ers organization; this and his lengthy recovery period taken were heavily scrutinized.

[29] The team's president of basketball operations, Bryan Colangelo, suggested that the rookie might very well sit for the remainder of the season; but on March 26, 2018, it was announced that Fultz would return to the hardwood for an upcoming game against the Denver Nuggets.

On November 20, 2018, his agent Raymond Brothers announced Fultz would not participate in practice or games until a shoulder injury was evaluated; his ailment was later described as thoracic outlet syndrome (TOS), the neurogenic type of the disorder which “affects nerves between the neck and shoulder resulting in abnormal functional movement and range of motion, thus severely limiting Markelle’s ability to shoot a basketball”.

[40] Magic coach Steve Clifford later stated in March that he did not anticipate Fultz returning to play during the season, stressing that his shoulder injury was indeed "very serious.