TORONTO -- Forward Leo Komarov has been placed on injured reserve by the Toronto Maple Leafs with an upper-body injury.

"He is unavailable to our hockey club for a minimum of one week," coach Randy Carlyle said. "We are looking at it probably 7-10 days."

Komarov sustained the injury in the second period of a shootout loss Thursday to the Buffalo Sabres.

The 26-year-old ranks third in the League with 126 hits and his loss will be especially felt by the Maple Leafs when they face the physical Boston Bruins on Saturday night.

Ryan Hamilton, recently recalled from the Toronto Marlies of the American Hockey League, will enter the lineup in place of Komarov. Carlyle said Hamilton will initially skate on a line with Mikhail Grabovski at center and Matt Frattin on right wing but could be elevated to play on the top line with Tyler Bozak and Phil Kessel.

Bruins coach Claude Julien said forward Rich Peverley will be back in the lineup after being a healthy scratch in Boston’s previous game against the Ottawa Senators. Defenseman Johnny Boychuk will not play because of a lower-body injury, which means Matt Bartkowski will play in his first game of the season.

James Reimer will be in goal for the Maple Leafs, and Anton Khudobin will start his ninth game of the season for the Bruins.

MAPLE LEAFS

James van Riemsdyk – Tyler Bozak – Phil Kessel

Ryan Hamilton – Mikhail Grabovski – Matt Frattin

Clarke MacArthur – Nazem Kadri – Nikolai Kulemin

Frazer McLaren – Jay McClement – Colton Orr

Carl Gunnarsson – Dion Phaneuf

Jake Gardiner – John-Michael Liles

Mark Fraser – Cody Franson

James Reimer

Ben Scrivens

Scratched: Michael Kostka, Joffrey Lupul (suspension)

Injured: Leo Komarov (upper body)

BRUINS

Milan Lucic – David Krejci – Nathan Horton

Brad Marchand – Patrice Bergeron – Tyler Seguin

Jay Pandolfo – Rich Peverley – Jordan Caron

Daniel Paille – Gregory Campbell – Shawn Thorton

Zdeno Chara – Andrew Ference

Dougie Hamilton – Dennis Seidenberg

Aaron Johnson – Matt Bartkowski

Anton Khudobin

Tuukka Rask

Scratched: Ryan Spooner

Injured: Johnny Boychuk (lower body)