Nick Piecoro of the Arizona Republic reports that there's no reason to expect the D'Backs to trade the likes of Felipe Lopez and Doug Davis away, even if they decide they're willing to part with their impending free agents. The D'Backs could eventually investigate deals, but they aren't doing so now. Instead, they're focusing on getting as much production as possible from the players they have.
Since few teams are willing to take on salary or part with talented young players, the D'Backs could decide to hold on to their players and hope to receive draft picks in compensation for losing them as free agents. However, the players could always accept the D'Backs' offers of arbitration after the season, leaving the team with contracts they don't want or can't afford.