Joel Embiid now weighs close to 300 pounds, representing a substantial gain from his 250 pounds while at Kansas last year.

Embiid's work ethic is being question by some within the Philadelphia 76ers.

Embiid had a blowup with assistant strength and conditioning coach James Davis, which is one of the reasons he was sent home during the team's recent West Coast road trip.

"He's a young, 20-year-old kid who is trying to figure his way into being a professional basketball player and learning life," Luc Mbah a Moute said.

Because of his foot injury, his conditioning has been limited. Embiid can only do things such as use the antigravity treadmill and take long walks to generate a rapid heart rate.

The Sixers are trying to address the added weight. Embiid, however, hasn't always been a willing workout participant, according to sources. He's even blown off conditioning drills, one source added.