BOSTON -- Even without Kevin Garnett, the Boston Celtics beat the Miami Heat.

Easily.

With the good-humored but hard-playing Glen Davis filling in while the Celtics' emotional leader served a one-game suspension, Boston rolled to a 106-77 victory Tuesday night that Miami coach Erik Spoelstra called "embarrassing."

It gave the Celtics a 2-0 lead in their playoff series and Davis a chance to reprise the nickname he hung on himself last year when he replaced the injured Garnett -- known as the "Big Ticket" -- in all 14 playoff games.

"The 'Ticket Stub' came," Davis said. "Whenever they need the 'Ticket Stub,' he'll be there."

Davis had 23 points and eight rebounds, and Ray Allen heated up in the third quarter and scored 25 points. Dwyane Wade led the Heat with 29.

With Garnett serving a suspension for elbowing Quentin Richardson in Game 1, Davis started and went aggressively to the basket to grab missed shots and draw fouls.

"That's a case of one man impacting the game simply with his effort. I don't think they ran one play for him," Spoelstra said. "You cannot let a man's effort exceed yours. It's as simple as that."

The Heat took a 29-25 lead on a dunk by Jermaine O'Neal. But the Celtics used a 44-8 surge over the next 16 1/2 minutes to go ahead 69-37 with 5:38 left in the third quarter, capped by one of Allen's five 3-pointers in the period.

"Once the ball started moving and we started getting multiple stops, we were off and running," Boston coach Doc Rivers said.