David Pastrnak scored twice in quick succession, Brad Marchand had a goal and two assists and the Boston Bruins held off the Toronto Maple Leafs 6-4 on Wednesday night to tie the first-round series 2-2.David Pastrnak scored twice in quick succession, Brad Marchand had a goal and two assists and the Boston Bruins held off the Toronto Maple Leafs 6-4 on Wednesday night to tie the first-round series 2-2.     Charlie McAvoy had a goal and an assist, Zdeno Chara and Joakim Nordstrom also scored and Tuukka Rask made 38 saves.     Auston Matthews scored twice for Toronto. Zach Hyman and Travis Dermott also scored and Frederik Andersen stopped 25 shots.     Game 5 is Friday night in Boston.     After the Maple Leafs overcame a 2-0 deficit to tie it early in the second period, Pastrnak put Boston back in front at 3:16 when he redirected a pass from Marchand on a 2-on-1. The Bruins then got a power play when Matthews went off for roughing, and Marchand whipped a backhand pass to a wide-open Pastrnak, who snapped the puck short-side on Andersen for his second goal in 1:35.     Chara made it 5-2 at 5:39 of the third. At 42 years, 30 days, the Boston captain became the second-oldest defenseman in NHL history to score a playoff goal. Chris Chelios holds the record at 45 years, 86 days.     Matthews scored on the power play with 8:08 left, and Dermott made it 5-4 through traffic with 6:33 remaining. Nordstrom scored into an empty net with two seconds to go.     NOTES: Boston was 2 for 2 on the power play. Toronto went 1 for 3. ... Boston: 2-2; Toronto: 1-3. ... Canadian hip hop artist Drake and Toronto Raptors coach Nick Nurse attended the game.