Many teams come to Summer League looking for 10th to 14th guys to fill out their roster, and to give their fresh draft picks some game action using the basic sets they will be asked to run in training camp and regular season.
The rules for Summer League competition limit participation to NBA players currently under contract to those with two years of NBA experience or less. This is the last time Archie or Alex, as long as they are under contract, can play in Summer League.
Free agents, such as Josh Harrellson and Luke Harangody, can play despite their NBA experience because they're trying to earn their way onto a team.