After working out 34-year-old Nazr Mohammed Thursday, it is clear the Miami Heat are looking to add a backup center to the roster and, according to the Miami Herald’s Barry Jackson, are most interested in another big man.

Among free agent centers, the Heat is most intrigued by Emeka Okafor. But ESPN said he might not play until midseason because of a herniated disk. The Heat also has inquired about 6-11 free agent center Andray Blatche, who has a home here.

Okafor, however, missed all last season and will likely miss much of the upcoming season with a herniated disk. Still, he’s the most talented of the remaining free agent centers and could create interesting lineups by allowing Chris Bosh to move to power forward. But he can’t do that if he isn’t healthy, and that is teams’ primary concern right now with Okafor.

Mohammed would be a solid pick up, but wouldn’t do much other than spot minutes here and there. Okafor would push Josh McRoberts for a starting slot if healthy. When he is healthy, he tends to play upwards of 70 games per season.

Okafor was selected No. 2 overall by the expansion Charlotte Bobcats and has spent five seasons there until signing with the New Orleans Hornets and then with the Washington Wizards two years ago. He’s averaged 12.3 points and 9.9 rebounds per game over his nine-year career.