Greg Oden will host three teams this week as the former No. 1 overall pick nears a decision on where he'll launch his NBA comeback, according to sources with knowledge of the free agent center's plans.

Sources told ESPN.com on Monday that the Miami Heat, New Orleans Pelicans and Sacramento Kings will all send representatives this week to watch Oden work out in person.

Sources say that the San Antonio Spurs and Dallas Mavericks -- which had face-to-face meetings with Oden last week -- also remain in contention for the 7-footer's services. But the Heat and Spurs established themselves as the frontrunners to land Oden last month and, according to one source close to the process, remain the co-favorites to sign him.

ESPN.com reported last week that the Cleveland Cavaliers also were in the mix prior to their signing of center Andrew Bynum.

The pursuit for Oden was accelerated last week in Las Vegas when the 25-year-old sat down with representatives from the Mavericks and Kings. A scheduled meeting with the Pelicans in Las Vegas, sources said, was in the process of being rescheduled for this week.

Oden has played just 82 career games in the NBA after being selected by Portland with the top overall pick in the 2007 draft. He hasn't appeared in an NBA game since Dec. 5, 2009 due to numerous knee problems and underwent his third microfracture knee surgery in February 2012.

Miami has actually been considered a leading contender for Oden for months after Heat president Pat Riley hosted him for a two-day visit earlier this year. That was even before Oden's comeback, through workouts back home in Indianapolis or at Ohio State, progressed to the serious stage it has reached now.