Just saw Don Harris from WOAI in SA interview Chad Ford from ESPN about the draft. Obviously ESPN reporters are prone to hyperbole, so take this with a grain of salt, but Ford expects Spurs to trade either Hill or Parker to move into the top 10 of the draft, to go after Derrick Favors. He cites speculation from around the NBA, not from the Spurs. He says, though, if they stay at 20 (unlikely he says), they might go after Damion James or Solomon Alabi.
IMO, the draft this year is weak and no one player is a guarantee, and trading Parker or Hill would have the Spurs needing another PG.
Again, though, this is just speculation. Sorry, no link either. I just saw it on local TV here in SA. Nevertheless, good topic for discussion.