Boston increased it to 5-1 in the third on Mike Napoli’s bases-loaded RBI single. He improved to 6 for 9 and four RBIs this season with the bases full. Nava followed with a sacrifice fly before Oswalt got the next two outs to strand runners on second and third.
In the sixth, the Rockies cut it to 5-2 on Cuddyer’s leadoff homer off a billboard above the Monster seats. They had runners on first and third with one out before Lackey struck out Tyler Colvin and got Yorvit Torrealba on a liner to center.
In the eighth, Cuddyer hit a different sign above the left-field seats leading off against Junichi Tazawa.
Colorado had grabbed a 1-0 lead on when Rosario singled after Carlos Gonzalez singled and stole second.
NOTES: Cuddyer had his ninth career multihomer game, first since July 24, 2012, at Arizona. ... Boston entered the day leading the majors with 172 doubles and had three more. ... Rockies OF Dexter Fowler was out with a sore right wrist. ... The Red Sox activated RHP Clayton Mortensen from the 15-day disabled list after optioning RHP Pedro Beato to Triple-A a night earlier. Mortensen was sidelined since June 11 with a strained right groin. ... The teams are scheduled to meet again in Colorado on Sept. 24 and 25 for the Rockies’ final two home games of the season. ... The Rockies host the Mets in a makeup of the teams’ April 17 snowed-out game today. New York’s Tyler Chatwood (4-1, 2.22 ERA is slated to face Jeremy Hefner (2-6, 3.89 ERA). ... Boston is scheduled to play the first of four against the Blue Jays today. Jon Lester (7-4, 4.57ERA) is expected to face Toronto’s Chien-Ming Wang (1-0, 2.18). ... Boston’s Stephen Drew had a triple for the second straight game.