ST. LOUIS -- After two straight days of epic ineptitude on offense, Colorado broke out in a big way on Sunday.
Troy Tulowitzki cracked a three-run homer and Class AAA callup Charlie Blackmon added a two-run shot to support Jorge De La Rosa's seven shutout innings as the Rockies routed St. Louis 8-2 at Busch Stadium.
In snapping a four-game losing streak and improving to 20-17, Colorado rapped out 11 hits and scored multiple runs in three different innings. The Rockies went 49 at-bats without a hit in the series' first two games, getting one-hit by Shelby Miller on Friday night and two-hit Saturday by Adam Wainwright.
Meanwhile, De La Rosa (4-3) muffled the St. Louis bats, not allowing a hit until David Freese smashed a one-hopper off the glove of diving first baseman Jordan Pacheco with two outs in the bottom of the seventh inning.
De La Rosa finished with seven strikeouts and three walks, utilizing a sharp-breaking slider to tie up many hitters. He was bidding for the Rockies' first no-hitter since Ubaldo Jimenez had one in April 2010 at Atlanta.
Colorado broke its 28-inning scoreless streak in the third off Jaime Garcia (4-2). With two outs, Jordan Pacheco and Carlos Gonzalez singled, followed by Tulowitzki's eighth homer of the season, a 394-foot blast to left center that landed in the Rockies' bullpen.
Blackmon made it 5-0 in the sixth when he launched a 407-foot clout into the right-center field bleachers with Nolan Arenado aboard.
The Rockies tacked on three runs in the eighth off reliever Carlos Martinez. Pinch-hitter Reid Brignac lashed a two-run double into the right-field corner and then scored on Dexter Fowler's single.
St. Louis (23-13) avoided a shutout in the ninth on Matt Adams' pinch-RBI single and Pete Kozma's sacrifice fly but lost for just the second time in 11 games.
NOTES: Colorado promoted Blackmon after placing right fielder Michael Cuddyer on the 15-day disabled list Sunday with an inflamed cervical disc. Cuddyer was hitting .319 with seven homers and 23 RBI but hasn't played since Wednesday. ... St. Louis put right-hander Jake Westbrook on the 15-day disabled list, retrocactive to May 9, with right elbow inflammation, and called up left-hander John Gast from Class AAA Memphis. Westbrook was 2-1 with a 1.62 ERA in seven starts this year and led the National League in ERA during April. Gast will start in Westbrook's place on Tuesday night against the New York Mets. ... To make room for Gast, right-hander Jason Motte was moved to the 60-day disabled list. Motte is out for the season after undergoing Tommy John surgery on his right elbow.