Would love to catch the Raptors and grab the 2nd seed. Its possible for sure. This team is playing so hard and on any night you can have someone that beats you. Getting Kelly back is going to be big down the stretch.
It's possible for the Sixers to have a better W/L record than the Celtics but it's not likely. Catching the Raptors is not quite as unlikely, but don't hold your breath.
Toronto is 4.5 games ahead of the Celtics with about 25-27 games to go. They have a pretty easy schedule left with 4 more games at home on the road. Beyond one road game against the Spurs, it's possible that they may be favored in every other game left. They're 16-5 since Jan 1. Even if the Cs put up a 20-5 record (which is exceptionally unlikely) in their last 25, it might not be enough to catch Toronto.
Simply put the Cs should strive for 50 wins (17-8 in their last 25 to do it) and that 3rd place seed. That would be a MASSIVE accomplishment for this team. Just avoiding a slump and going
46-36 (13-12 to finish the year) would still be an 8 game improvement, a likely first round playoff series at home and make the Cs attractive for prospective FAs.