Let's say that... we have a 7th pick and that we buy a pick in 15-20 range.
We also have the 30th pick, s we now have 3 first round picks. There has been no trades so the team roster is still unchanged.
Let's also say that we picked Gerald Green with the 7th pick.
If the following names were available with the 15-20 pick, who would you go for? Why?