SAN DIEGO -- Todd Helton's pinch-hit two-run homer in the seventh inning allowed the Colorado Rockies to sweep the San Diego Padres for the second weekend in a row as they earned a 2-1 victory on Sunday before an announced crowd of 21,337 at Petco Park.
Jorge De La Rosa (1-1), who allowed only one runner to reach second, tossed a two-hitter and struck out seven for the decision. He walked two.
The Rockies (8-4) won their third straight and sent the reeling Padres (2-10) to their fifth loss in a row.
Clayton Richard and De La Rosa were locked into a duel for much of the game as both pitched shutouts through six innings and allowed only two hits apiece. Richard, though, was relieved in the seventh by Dale Thayer after 104 pitches.
Thayer (0-1), who hadn't allowed a run in 5 1/3 innings this season, gave up a leadoff walk to third baseman Chris Nelson before Helton delivered his game-winner to right with one out. It was Helton's first home run of the season and his third as a pinch hitter. His last pinch-hit home run occurred April 29, 2012, against the Mets.
On Sunday, it was enough offense to give the Rockies and De La Rosa another victory over the woeful Padres.
Closer Rafael Betancourt gave up a run-scoring sacrifice fly by Jedd Gyorko with two outs in the ninth before striking out Nick Hundley and recording his fifth save.
NOTES: No San Diego starter has pitched into the seventh inning this season. ... Infielder-outfielder Kyle Blanks, who served as a pinch-runner in the ninth, was called up by the Padres from Triple-A Tucson. To make room, the club optioned reliever Thad Weber, who was called up Friday, back to Tucson. Blanks, 26, batted .296 (8-for-27) with a home run, three doubles, four RBI and seven runs in eight games for Tucson. Blanks had a strong spring, hitting .354 (23-for-65) with three home runs, five doubles, a triple, 14 RBI and 17 runs. ... The Rockies led the majors with 15 road home runs entering Sunday. ... Colorado catcher Wilin Rosario homered Saturday and recorded four hits for the first time. Since being added to the roster on Sept. 6, 2011, Rosario has smacked 35 home runs, tops among major-league catchers.