Can people with Rheumatoind or Osteo Arthritis, get into Pro Leagues eg NBA? (Please anwser ASAP)

Can people with Rheumatoind or Osteo Arthritis, get into i.e Drafted, and play in Pro Leagues like NBA, NCAA or NFL. The player is a Male, 20 years old , 5'9 and  is quite good at playing basketball. With the above stated situations what are his prospects of getting into Pro Leagues?

Do these Leagues allow such kind of Players to play, at NBA and NCAA, or they are completely not sllowed to get through into these Leagues.