By Fluto Shinzawa, Globe Staff

Nathan Horton practiced Tuesday for the first time since suffering an upper-body injury on April 20. Horton could be available tonight to play alongside usual linemates Milan Lucic and David Krejci.

Rich Peverley, a playoff regular, could be a healthy scratch. Peverley was a spare forward in Tuesday’s practice. Kaspars Daugavins took regular shifts on the No. 3 line with Chris Kelly and Jaromir Jagr.

Puck drop: 7 p.m.

TV/radio info: NESN (Jack Edwards, Andy Brickley, Naoko Funayama),98.5 The Sports Hub (Dave Goucher, Bob Beers)

Records: Leafs 0-0, Bruins 0-0

Projected Leafs lineup (courtesy of the Toronto Star):

James van Riemsdyk-Tyler Bozak-Phil Kessel
Joffrey Lupul-Mikhail Grabovski-Nikolai Kulemin
Clarke MacArthur-Nazem Kadri-Matt Frattin
Leo Komarov-Jay McClement-Colton Orr

Carl Gunnarsson-Dion Phaneuf
Mark Fraser-Cody Franson
John-Michael Liles-Ryan O’Byrne

James Reimer
Ben Scrivens

Healthy scratches: Joe Colborne, Frazer McLaren, Ryan Hamilton, Jake Gardiner, Mike Kostka

Projected Bruins lineup:

Milan Lucic-David Krejci-Nathan Horton
Brad Marchand-Patrice Bergeron-Tyler Seguin
Kaspars Daugavins-Chris Kelly-Jaromir Jagr
Daniel Paille-Gregory Campbell-Shawn Thornton

Zdeno Chara-Dennis Seidenberg
Andrew Ference-Johnny Boychuk
Wade Redden-Adam McQuaid

Tuukka Rask
Anton Khudobin

Healthy scratches: Dougie Hamilton, Aaron Johnson, Rich Peverley, Carl Soderberg, Jay Pandolfo

Storylines: Wade Redden is expected to play tonight on the third defensive pair with Adam McQuaid. The Bruins traded a conditional 2014 seventh-round pick to St. Louis for Redden. The condition was that it would become a sixth-round selection if Redden appeared in one playoff game… McQuaid will make his first postseason appearance since 2011. McQuaid missed last year’s playoffs because of a concussion… The primary question with the Maple Leafs is the availability of Tyler Bozak. The top-line center didn’t play the last two games because of an upper-body injury. If Bozak can play, he should slot in between James van Riemsdyk and Phil Kessel… Kelly Sutherland and Chris Lee will be the referees. Jean Morin and Scott Driscoll will be the linesmen.