Story added his sixth homer off Ryan Buchter in the bottom of the ninth.
Matt Kemp blasted a three-run homer in the fifth and Melvin Upton Jr. went deep for two in the sixth, both off reliever Justin Miller, for an 11-5 lead.
It was a festive occasion for most, but not for starting pitchers. Rea gave up five runs on six hits and four walks, and lasted just 3 1/3 innings, with Story's homer being his goodbye delivery -- yet he wasn't the losing pitcher.