The Houston Rockets are zeroing in on free agent Dwight Howard. On Sunday, the Rockets released Carlos Delfino and Aaron Brooks before reportedly agreeing in principle to a trade that would send Thomas Robinson to the Trail Blazers.

The moves were meant to clear up the necessary salary space to offer Howard a max contract. And if they do in fact land Howard, then their roster changeover could very well continue.

CBS Sports' Ken Berger reported Sunday night that the Rockets are already shopping point guard Jeremy Lin and center Omer Asik, and that the Sixers are a possible landing spot for the latter.

From Berger: "If the Rockets land Howard, Asik would become expendable. One potential destination that rival executives have identified is Philadelphia, where former Rockets executive Sam Hinkie is the Sixers' new general manager.