It's simple, look at all the playoff caliber teams, all their Centers are not small.
All the playoff teams have a fundamentally sound lineup, they're not using 6-8 or 6-6 players as Centers.
Of all the 16 playoff teams right now, east and west, the Celts have the weakest starting Center.
That doesn't really respond to my question.
The Celtics have lost 13 games this season.
Of those losses, the following are against teams over .500:
@ Milwaukee
@ Philly
vs Raptors
vs Sixers
@ Pacers
@ Denver
@ LA
@ Philly
You'll notice that 6 of those 8 losses are on the road.
The Denver loss was at the end of a long road trip, and Kemba suffered a scary injury early in the game.
Of those losses, three of them (Philly, Toronto, Milwaukee) were on the second night of a back to back.
I'm not seeing a clear narrative forming here that the Celts simply can't compete with the best teams.
They lost to the Clippers in OT on the road. They've beaten Toronto twice, Milwaukee once, Dallas twice, Miami once, and Denver once. Those are all solid wins.
I would love to see the Celts get some signature wins against the best in the league. But I don't think it's accurate to suggest the Celtics have struggled against the better teams in the league any more than most of the other playoff caliber teams have.