The Boston Celtics might need a little more than just some sheer shamrock luck to snap out of a recent funk. The Celtics have lost four straight games at home, interrupted only by a nonconvincing win over the Cleveland Cavaliers on the road.

What do they all have in common? They've all resulted from blown leads.

Boston blew a 17-point lead to the Houston Rockets during leap day and that's against a team that has had its share of struggles. They went on to blow a 21-point lead to the Brooklyn Nets, who made the most of Marcus Smart's ejection to win in overtime. Then came the waste of an early 11-point lead against the Utah Jazz, only to pilfer it away.

The latest was an 18-point blown lead to the Oklahoma City Thunder on Sunday, one that will sting, considering the playoff implications.

Simply put, the Celtics could have made matters hot for the second-place Toronto Raptors, who have only won six out of their last 10 games, but they have struggled to a 5-5 tune in their last 10.

Before this recent stretch, the Celtics were a spiffy 19-0 at home when leading by at least 11 points.

“This is a low for us,” said Celtics forward Gordon Hayward after a 105-104 loss to the Thunder, according to Jay King of The Athletic. “We have to try to build ourselves, crawl ourselves back out of it. I think we’ll find it again. We’re still the same team. We’ve just got to lift each other up, find ways to win basketball games again.”

Letting these bad habits die, however, will take more than a team-wide decision to regain focus and some encouragement. It will take a sense of continuity and self-determination to pull out of this rut — and it must start with Kemba Walker.

The Celtics have been without Walker and Hayward through the last stretch of the season. Walker missed eight of the team's 12 games in February and he's been slowly gearing up to an increased workload.

Hayward missed the last two games with a sore right knee before facing the Thunder and he's had difficulty figuring out his spot in the pecking order with other potent scorers in the lineup. Jaylen Brown has also missed the last three games with a right hamstring strain.

The Celtics woes can be directly linked to their personnel, yet losing leads has a lot to do with focus and maintaining intensity — something Brad Stevens has struggled to get with his lineups.

Stevens has doled out a heavy dose of Brad Wanamaker lately, especially in fourth quarters. His knack for defensive plays earned him 21.9 minutes per game in February. Yet coach and front office need to reconvene and figure out how to best approach the final 19 games of the season.

Stevens expressed the plan is to only rest Walker in decided matchups the rest of the season, hoping his latest five-game absence is the last due to his knee issue. But Walker hasn't had a game in which he's shot over 50% in his last 10 games with the Celtics. That dates back to a 37-point night against the Orlando Magic on Jan. 24.

If Walker is the franchise player, the emphasis should be on having him thrive as the focal point of the offense. Instead, the 6-foot max signing has shot under 42% in each of his last 10 games — a sign he's only partly engaged in this offense.

While some of that is a byproduct of the system and having two other 20-point scorers in the starting lineup, most of it can be traced back to how he's being utilized. So long as he remains a contributor instead of a leader of this team, as he was earlier this season, the Celtics will have a tough time crawling out of this funk with no clear sign of leadership on the court.

Healthy bodies will only take the Celtics so far, and while continuity does help them, it is outright leadership that can help them mend these mental woes.