I agree that he is an outlier, but #43 Tyrese Proctor is not the lowest ranked guy on
ESPN's Top 100 Big Board who has eligibility left. Among the early entrants from college who stayed in the draft, #59 RJ Luis of St. John's and unranked Omar Rowe of Division II Morehouse also could have returned to school.
There are also the following early entrants from international teams or otherwise not from college. They still have until June 15 to withdraw -- not really an eligibility issue, but they are young enough to wait for a future NBA Draft.
44. Michael Ružić
51. Neoklis Avdalas
54. Mouhamed Faye
56. Dink Pate
64. Ben Henshall
67. Malique Lewis
69. Izan Almansa
78. Saliou Niang
86. Mohamed Diawara
97. Eli John Ndiaye
Plus another 11 who are unranked.