BALTIMORE -- The Orioles have had a flair for the dramatic the past two days at Camden Yards.
It wasn't as pretty as Nolan Reimold's two-out walk-off homer in the ninth inning Sunday, but the Orioles walked off for the second straight game on a ground ball back to the pitcher in a 3-2 win over the Rockies in 10 innings on Monday night. Adam Jones, off from third on contact, came racing down the line on Manny Machado's tapper back to the mound. And after Jordan Lyles muffled the catch, catcher Nick Hundley couldn't handle the throw that allowed Jones to score the winning run.
"It doesn't matter how you score," Jones said. "As long as you win the game, that's all that matters. … Overall, it was a really good game for the fans to watch."
• O's benefit from Jones' all-out effort in 10th
Jones, who had the Orioles' two RBIs, singled with one out in 10th to start the rally. He advanced to third on Jonathan Schoop's single before scoring.
"Just a dumb play that I should have made," said Lyles, who was charged with an error. "I've got to field my position better. That's a tough way to lose a game -- because I didn't field my position."
The Orioles' fifth walk-off win of the season ended the Rockies' four-game winning streak and pushed Baltimore's win streak to five. Baltimore is a season-high 18 games over .500 and holds a 2 1/2-game lead in the American League East with Boston losing Monday.
The Rockies tied the game in the fourth on Nolan Arenado's 26th homer and took the lead for the first time in the seventh when David Dahl picked up his first career hit and scored on Mark Reynolds' single, but they couldn't hold on to it. In the bottom half of the inning, Reimold came around to score on a ground ball by Jones after he was hit by a pitch.
While both starters entered with ERAs over 5.50, they managed to contain the high-powered offenses they faced. Rockies lefty Jorge De La Rosa allowed two runs (one earned) in 6 1/3 innings, while O's righty Yovani Gallardo held the Rockies to two runs in 6 2/3 innings.
"Really commanded the ball well and pitched where he had to on each guy," O's manager Buck Showalter said of Gallardo. "A lot of landmines in that lineup and kept the ball in the park for the most part. Unfortunately, couldn't get a W next to his name, but he was probably the key to the game for us."
MOMENTS THAT MATTERED
Keeping it going: As the Aug. 1 non-waiver Trade Deadline inches closer, the O's starting rotation keeps trying to prove a trade isn't necessary. Gallardo's quality start was the fifth time in a row an Orioles starter allowed two earned runs or fewer. In that five-game span, Baltimore's staff has allowed five earned runs in 32 2/3 innings (1.38 ERA). For Gallardo, it marked the second time he's recorded an out in the seventh inning after being unable to do so in each of his first 10 starts this season.
"We all feed off of one another," Gallardo said. "I think it's always a big help to have the guy in front of you go deep in the ballgame, and try to do the same thing or even better. It's always a friendly competition, and that's going to help and benefit in the long run as a team."

Arenado gets his groove back: After committing two errors in the first two innings -- the second of which contributed to Baltimore's first run -- Arenado redeemed himself in the fourth with a homer to lead off the frame. Arenado sent a 1-0 offering from Gallardo over the left-field wall, tying the game at 1. Since going a season-high 11 straight games without a home run, Arenado has gone deep three times in his last four.

Leaving 'em loaded: The Orioles were unable to capitalize on a great chance to get to De La Rosa early. With the help of an error and a walk, the O's loaded the bases with one out for slugger Chris Davis in the first inning. But Davis, who entered the game in an 0-for-18 slump, struck out, and catcher Matt Wieters grounded out to first.
"De La Rosa did an outstanding job against a really powerful, dangerous lineup," said Rockies manager Walt Weiss. "A lot of right-handed hitters, but he had his 'A' game going."

Dahl gets first hit, scores go-ahead run: Despite only landing in Baltimore at 4:19 p.m. ET, Rockies prospect Dahl was in the Colorado starting lineup, and the 22-year-old made the most of his Major League debut. After striking out in each of his first two at-bats, Dahl worked a full count against Gallardo in the seventh inning before singling up the middle with two outs for his first career hit. Dahl then advanced to second on a wild pitch and scored from second on a Reynolds single. More >
"It was awesome," Dahl said after going 1-for-4. "It was something I'll remember forever. I got the first one out of the way now, so it's time to just try to help the team win as much as possible."

QUOTABLE
"We lost three straight and it was kind of like an apocalypse was happening here, so we're just grinding it out every day, happy with the results we're getting." -- Jones, on the five-game winning streak
"It was probably the best-case scenario with the comebacker there with Machado up, but he didn't handle it cleanly and then it went downhill from there." -- Weiss, on Lyles' error
SOUND SMART WITH YOUR FRIENDS
With his RBI single in the second inning, Jones moved into sole possession of seventh all time on the Orioles' RBI list, passing Rafael Palmeiro with 702. He added another in the seventh on a groundout.

REPLAY REVIEW
With one out in the seventh, De La Rosa threw a pitch down and in that Reimold thought hit his foot. After a challenge, the call was overturned and Reimold went to first.

WHAT'S NEXT
Rockies: The Rockies send Chad Bettis (8-6, 5.31 ERA) to the mound for Game 2 in Baltimore on Tuesday at 5:05 p.m. MT. Bettis impressed in his last outing, throwing 6 2/3 innings of one-run ball in a 7-3 win against Atlanta on Thursday. The Rockies are 7-1 in Bettis' last eight starts, with the right-hander boasting a 4-1 mark over that stretch
Orioles:Chris Tillman (14-2, 3.18 ERA) will go for his Major League-leading 15th win in the second game of the series at 7:05 ET on Tuesday. The O's ace has dominated his past four times out, going 4-0 with a 1.29 ERA. In each of those four starts, Tillman went seven innings while allowing just one earned run.
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