@Kcmatt7
You raise an interesting issue about Frank and his draft potential. It is interesting because it is a case that illuminates a lot about why so many top short guys play more seasons in college than top long guys.
Market demand in the NBA is driven by a players skills and physical package.
Lot's of short guys can play on the X-axis in the NBA. Heck, Mugsy Bogues proved a 5-3 guy can ball in the NBA.
@drgnslayr is right about the 80% of the game being played from an average of 6 feet 6 inches down on the floor.
But of the 5 positions on the floor on offense, there is some variation in that 6-6 number, some standard deviation in that average if you will.
At point guard, 5-3 inch Mugsy Bogues suggests that the quite a lot of the game is played from 6-0 down.
At center and power forward in the NBA on the other hand, we don't see any 5-3 guys playing, and only about once in a generation do we see a 6-6 center, so we logically infer that 80 percent of the post and power forward positions are perhaps played 6-8 or 6-10 and under.
In turn, maybe the wings play 6-6 and under.
My point here is this: height is still relevant, however much of the game is played at lower than leaping levels.
Further, height is particularly important at the post and power positions and there remains in our culture a lesser supply of persons of heights suitable for playing 6-8 to 6-10 and down, than there are persons of heights suitable to playing 6-0 and down.
It is a numbers a game, as they say.
Sooooo.....
Since NBA teams can pick up guys capable of playing 6-0 and down almost any time (there being a relative abundance of such players), and since guys capable of playing 6-8 to 6-10 and down are rather more scarce, two tendencies manifest:
1.) NBA teams tend to draft 6-8 to 6-10 and down capable talent whenever it is available; and
2.) NBA teams tend to pick up 6-0 and down talent secondarily, unless they are already stocked up on the former.
When all the teams are drafting with this tendency, short guys tend to have to prove themselves more and longer, and distinguish themselves with better numbers, in order to finally get a team to take a risk on them.
And since these shorter players are in a longer cue (including short players in the NBA, short players in D-League, and short players in D1), it takes them more seasons of stellar play to convince the NBA GMs to take them, unless they are freakishly talented in a relatively long package (Derek Rose, etc.). Even a 6-2 guard is apt to be picked ahead of Frank Mason. Even Frank Mason is apt to be picked ahead of Nic Moore. And so on.