For sure, we might be seeing some NBA players that gets fat/weight once the league resumes.
But, we might see less with the superstars I guess.
Players from a team that will not likely to qualify the playoffs, they can get fat, lol..
On the serious side though, they are professional, they know that only when they are fit, they can perform best, so they would not blame the situation that they are getting fat, instead they will continue to work out and stay fit as the season might resume anytime soon.