The Rockets are trying to trade Thomas Robinson in order to free up cap space to aid in their pursuit of Dwight Howard, league sources told Yahoo! Sports' Adrian Wojnarowski.The Rockets only acquired Robinson from the Kings at the trade deadline. According to Wojnarowski, the Rockets have told rival teams they'll accept the best offer possible for Robinson, which includes a trade exception, a draft pick or non-guaranteed contracts. If the Rockets move's Robinson's $3.2 million salary, they would be able to offer Howard a deal worth roughly $20.5 million annually, according to Wojnarowski. Robinson averaged 4.8 points and 4.5 rebounds in a combined 70 games.