The Miami Heat, hampered by limited spending, may take a shot at restricted free-agent center Greg Oden.Oden, the No. 1 overall pick in the 2007 NBA Draft, has been presented with an $8.9 million one-year qualifying offer from the Portland Trail Blazers. Miami could offer to pick up part of a $5 million mid-level exception.The Ohio State standout has missed the last two seasons due to multiple knee issues. He has an examination this week to determine if he is cleared to practice for the upcoming lockout-shortened NBA season.Heat president Pat Riley is known to swing improbable deals – like acquiring LeBron James and Chris Bosh two seasons ago. The addition of a healthy Oden would give Miami a dominant defensive force in the paint, something the team lacked last season.Free agency begins Monday in the NBA.