Nathan Horton has been ruled out for the rest of the Stanley Cup Final because of a severe concussion. Tyler Seguin, a healthy scratch for Game 3, will return to the lineup tomorrow. Seguin should skate on the third line.

The Bruins have options for the first line. Michael Ryder and Rich Peverley took some shifts on the No. 1 line in Horton's spot last night. If they want a pure scoring line, Ryder will play with David Krejci and Milan Lucic in Game 4. If they're looking for a better two-way presence, Peverley will slide in for Horton.