I think this is a win-win-win. (I guess not for the blazers) The spurs lineup could be really good, but it really depends on what Mitch Johnson does. But the spurs get the ability to have some experience on the team, since they are really young. Besides, there was a guard logjam. Now, in the draft, they could have Johnson Jr, Swain, or graves. But if they get Jayden they should take him. Most likely they would draft graves, who would complement wemby. This could be the lineup:

Pg: Castle/ Donte DiVincenzo Sg: Harper/ Vasell Sf: Julian Champagnie/ Keldon Johnson/ (Graves) Pf: Jerami Grant/ Carter Bryant/ (Graves) C: Wemby/Luke Kornet

Also, Fox and Edwards would be an electric duo