I'll admit, I don't have the statistics in front of me to back it up, but based on eye-test, it just seems like this team tends to dig too many deep holes especially early on in games.
Now yes, they are 40-17 without Gordon Hayward and with all the injuries they've suffered and fatigue from a tough schedule before the London game, and it's true that they've managed to come back from many of those deficits and even win.
They almost did it again last night, but the Pacers held on and Oladipo torched us.
All that said, this really isn't the best formula to win games, ESPECIALLY in the playoffs. The teams we will play in the playoffs will no doubt have elite players (like Oladipo) who can win games for their teams late. And I doubt most of those teams will simply just fold and blow a lead like that in the playoffs with uncharacteristic mistakes that often (especially over the course of a 7-game series).
In last year's playoffs, the Celtics lost 9 games (2 to CHI, 3 to WAS, and 4 to CLE). Out of those 9, 5 of the games they lost by falling behind 15+ EARLY and they never came back (got blown out). In one of the games vs. CHI, they trailed by double digits for a while early and never managed to come back.
I'm just saying, this team needs to find consistency and actually start games off well. It's one thing to be in a tight game early and fall behind by like 8-10 (it is a game of runs), but falling behind by like 20+ and looking awful before halftime is not something that should be a habit for this team, period.
It could work against mediocre teams, but against elite teams like Toronto, or Cleveland, or Washington, or even the likes of Indiana/Miami, it won't work. We couldn't claw back vs. Toronto on Tuesday from a 20+ deficit, and last night couldn't get the job done after balling behind like 25 and making a late, but ultimately unsuccessful comeback.