It doesn’t sound good.
Shams Charania of Yahoo Sports:
Smith joins a long list of recent Philadelphia first-rounders who suffered serious injury before their rookie years – Nerlens Noel, Joel Embiid, Ben Simmons, Markelle Fultz, Landry Shamet. Though the 76ers sometimes drafted hurt players, there’s also a lot of bad luck on that list.
It’s unclear how much time Smith will miss. He might return before the regular season. He might miss a huge chunk of the season.