The NBA Summer League provides a great opportunity for players to showcase their skills in front of the league's coaches, general managers and owners alike.
The San Antonio Spurs, who came off of an NBA Finals appearance last season, don't necessarily need to add any new players who could potentially shake everything up. However, the Spurs have had a history of turning average players into good players who fit into their system, even if the player is a late second-round pick (i.e. Manu Ginobili).
These are four new or returning players who should secure a roster spot by the beginning of the season.