"We finally got a big hit. 'Byrnsie' was huge," said Upton, whose single was his first hit in 18 at-bats this season. "Hopefully it's a momentum builder. All we can do right now is battle."

It's a start. Only Houston had scored fewer runs among NL teams, and the Diamondbacks entered Tuesday's game with the lowest on-base percentage (.282) and on-base-plus-slugging percentage (.660) in the league.

"Some games we've given the first pitch away and got behind in counts. Other games we've swung too early in counts. We're a little in-between right now," D-backs manager Bob Melvin said.

Despite the heroics Tuesday, the most glaring lack of production has come from the outfield, considered one of the offensive strengths. Byrnes, Jackson, Chris Young, Upton are a combined 18-for-100 with two homers and nine RBIs, including Jackson's one start at first base.

There is speculation that Upton, 21, needs to return to the minor leagues to regain the stroke he had last April, when he hit .340 with five homers and 15 RBIs, although the D-backs do not seem so inclined.

"I think we need to get a couple of good games under our belt to get our momentum going for us. We haven't been able to do that. And like anything in this game, confidence plays a lot into it. It starts with some big hits in big situations," Melvin said.

DIAMONDBACKS 7, CARDINALS 6 (10 innings): Eric Byrnes singled into the left field corner to drive in Justin Upton from third base with one out in the last of the 10th inning, and the D-backs broke a three-game losing streak. Arizona displayed the ability to come back, a trait that had eluded the team the first week of the season. Byrnes had his second hit and second RBI of the year, while Upton's 10th-inning single was his first hit of the year. Conor Jackson and Mark Reynolds homered as pinch hitter as the D-backs overcome a 3-0 deficit.