I don't give credit to Simmons' theory but I must admit I'm really worried now. It's been a long time since KG had his surgery, and he is still not playing basketball while the season starts in about a month...
Plus, the reports from the Celtics staff are very similar to the ones of last season, saying that they were just delaying his return... until they revelead he wouldn't be able to compete in the playoffs.
Hopefully we are just overreacting but I wish the season (or training camp) started tomorrow, to know what's up with KG's knee.