Everett, ejected Saturday after arguing with Kulpa over whether his foot was out of the batter's box, was greeted with mixed reaction when he came to the plate for his first at-bat Sunday.
He was cheered in the third when he made a sliding, backhanded catch on Geoff Blum's drive in the third, then doubled in the bottom half and hit his 25th homer in the sixth.
In his final plate appearance, the only one in which the switch hitter batted right-handed, he used the same stance as he did Saturday and walked.
Tim Wakefield (6-5), who joined the starting rotation June 29, won his fourth straight start, allowing two runs one earned and four hits in seven innings. John Wasdin finished with hitless relief for his first save in three chances.
Mike Johnson (4-4) gave up three runs and five hits in five innings.
After a tense series with the New York Mets, the atmosphere at Fenway Park was much calmer.
Morgan Burkhart's RBI single in the fifth gave Boston a 3-2 lead, and Everett homered in the sixth following a sigle by Nomar Garciaparra, who went 1-for-4, dropping his average to .393.
Montreal went ahead 1-0 in the second on Lenny Webster's run-scoring single before Boston tied on Jason Varitek's RBI double in the bottom half.
Guerrero's homer over the left-field screen put the Expos ahead 2-1, but Boston tied it on Troy O'Leary's RBI grounder in the fourth.
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