The NBA can be very cruel.
If you are a second-round pick, the pressure to perform early and prove your worth is even greater. There are seldom any guarantees for players taken in the second round and they have to prove themselves over and over again.
It goes double for a player like Wesley Iwundu who spent three years in college and figured to be a more readymade player.
Of course, that was not the case. He slipped to the second round because he displayed a ton of defensive acumen and an improving jump shot.