DENVER -- The Colorado Rockies tore into Edinson Volquez once again on Friday night, driving the San Diego Padres starter from the game in the third inning and building a six-run lead.
It was barely enough as the Rockies eked out a 10-9 victory when Nolan Arenado led off the ninth with a home run against Joe Thatcher. It was the Rockies' first walk-off home run this season and Arenado's fifth homer of the season.
The Rockies' lead vanished after Jorge De La Rosa gave up four runs as he wobbled through five innings. The Padres also teed off on Rob Scahill in the seventh when they scored five runs to tie it at 9.
Volquez, who gave up 11 hits and nine runs in 2 1/3 innings, has a 14.66 ERA in three starts against the Rockies this season, having allowed 26 hits and 20 runs (19 earned) in 11 2/3 innings. Scahill's calamitous outing took him off the hook.
De La Rosa gave up a 11 hits, tying his season high. Scahill took the mound in the seventh and hit leadoff batter Chase Headley with a pitch. Carlos Quentin and Jedd Gyroko hit back-to-back home runs to cut the Rockies' lead to 9-7. Kyle Blanks lined a double to left and scored on Cameron Maybin's single that finished Scahill.
Josh Outman came on and walked Yasmani Grandal before retiring pinch-hitter Jesus Guzman on a foulout. Maybin stole third base standing up as Outman was in the process of walking Chris Denorfia to load the bases.
Everth Cabrera hit a slow roller to second base and beat DJ LeMahieu's throw for a tying single. Outman struck out Headley and gave way to Wilton Lopez. He gave up hot shot to Quentin that Arenado backhanded at third and threw him out.
Carlos Gonzalez drove in three runs with two triples, and Todd Helton had his first three-RBI game of the season for the Rockies.
Most of the damage came with two outs in the second, when the Rockies erupted for five runs to go ahead 8-2. Gonzalez, the first of six straight batters to reach base, tripled home two runs, and after Volquez hit Troy Tulowitzki in the upper portion of his back with his next pitch -- home plate umpire Ed Hickox issued a warning to both sides -- Helton, who doubled home two runs in the first, lined a run-scoring single to center.
Arenado flared a run-scoring single to right center, and LeMahieu walked to load the bases. Yorvit Torrealba hit a slow roller that Headley charged at third, but Torrealba beat his throw.
De La Rosa yielded a two-run homer to Kyle Blanks in the second, the fifth homer of the season for Blanks and the first homer allowed by De La Rosa in 41 1/3 innings since he surrendered one to Hanley Ramirez on April 30 at Los Angeles.
De La Rosa gave up a run-scoring single to Quentin with two outs in the third to make the score 8-3 but struck out Blanks with runners on second and third to end the inning.
The Padres put runners on first and second for Blanks with two outs in the fifth, and he singled home a run to make it 9-4. Arenado saved a run by diving to his left for Maybin's hard smash and throwing him out to end the inning.
Dexter Fowler, who had hits on each of first three at-bats, led off the three-run first with a triple but was caught in a rundown on a squeeze bunt by Eric Young Jr. Young reached second on the play and, after a walk to Gonzalez, Tulowitzki singled home a run and Helton followed with a two-run double. It was Helton's 574th career double, tying him for 20th all time with Hall of Famer Charlie Gehringer.
NOTES: Padres 1B Yonder Alonso was diagnosed with a broken third metacarpal on his right hand and will be out four or more weeks. He was placed on the 15-day disabled list Thursday retroactive to May 31 with a right hand contusion, but a CT scan revealed a broken bone above the knuckle of his middle finger. In his absence, Blanks and Jesus Guzman will play first base with Mark Kotsay able to fill in there as well. ... LHP Jeff Francis (left groin strain) will be activated Saturday and make his first start since May 14, pitching in place of RHP Tyler Chatwood, who strained his right triceps Monday in a four-inning start at Cincinnati. ... Chatwood is scheduled to throw a light bullpen session on Saturday. The Rockies are eyeing a June 15 return for him, which is why he has not been placed on the 15-day disabled list. ... Fowler was back in the lineup after not playing Thursday due to a migraine headache that he said was his first. Fowler, who received an injection in his stomach on Thursday to relieve his symptoms and a CAT scan that came back clean, said, "I still got a little headache, but I'm fine." ... Rockies RF Michael Cuddyer, who tumbled across first base after hitting a game-ending grounder on Thursday, was not in the lineup because of what manager Walt Weiss termed general soreness. ... Colorado RHP Rafael Betancourt (right groin strain) is eligible to be activated June 16 but said it could be the end of June at the earliest before he returns. Betancourt received an injection on Monday and another Friday. ... De La Rosa was 0-for-19 this season when he singled in the second.