The Houston Rockets enter their dinner with coveted free agent center Dwight Howard on Sunday with the ability to offer him a four-year, $88 million contract after agreeing in principle to trade forward Thomas Robinson to Portland for two future second-round picks and the rights to European players Kostas Papanikolaou and Marko Todorovic, a source confirmed to ESPN.

"I got the news a couple of minutes ago," Robinson told FOX 26 in Houston. "I'm excited for Portland to give me a chance.

"Hopefully I'll be given a chance to show that I'm worthy of staying put."

An NBA general manager tells ESPN's J.A. Adande and Chris Broussard that he was offered point guard Jeremy Lin by Houston in a potential deal. Omer Asik is also being made available, according to sources.

Houston also waived veterans Aaron Brooks and Carlos Delfino earlier on Sunday to clear more salary-cap space.

Delfino averaged 10.6 points and 3.3 rebounds in 67 games last season. It was his first year with the Rockets after spending three seasons in Milwaukee.

Brooks played in just seven games for Houston last season when the Rockets signed him after he was released by Sacramento. It was his second stint with the team after playing for Houston from 2007-11.

Rockets general manager Daryl Morey took to Twitter to address the moves on Sunday.

"Thank you to @cabezadelfino (Delfino) & @Thirty2zero (Brooks), you both have been great Rockets, players & teammates. Hope there is a chance to reunite," he tweeted.

Information from The Associated Press was used in this report.