(My Sportsbook) - One of the National League's hottest teams meets one of the premier pitchers on the Senior Circuit tonight at Milwaukee's Miller Park, where Dan Haren and the Arizona Diamondbacks will try to cool off the sizzling Brewers.

Haren has produced a stellar 1.54 earned run average, second only to the Mets' Johan Santana among National League hurlers, through his first five starts of this season, but only has a 2-3 record to show for his efforts. Poor run support has plagued the 2008 All-Star in the early going, as the Diamondbacks scored only one run in Haren's three losses to start the year.

The standout right-hander has delivered back-to-back victories since that season-opening skid and is coming off a complete-game gem to beat the Chicago Cubs on Monday. Haren yielded only three hits in Arizona's 10-2 rout and struck out 10 batters without issuing a walk.

That dominating outing followed up a 2-0 triumph over Colorado on April 22, in which Haren fanned nine over seven shutout innings.

Haren has faced the Brewers twice previously, but both appearances came back in 2004, when the 28-year-old was a member of the St. Louis Cardinals. His only career start against Milwaukee was a no decision at Miller Park, although he threw five innings of one-run ball in that game.

He'll be matched up against a Milwaukee squad that had won eight times in a nine-game stretch and ripped up four straight victories before Friday's 5-2 loss to the Diamondbacks.

The Brewers led 2-1 after seven innings, but Arizona erupted for four runs off relievers Carlos Villanueva and Todd Coffey in the top of the eighth to avenge a 4-1 defeat to Milwaukee in Thursday's opener of this four-game series. Tony Clark had the biggest hit of the uprising, a pinch-hit two-run double that snapped a 2-2 tie.

Justin Upton also drove in a pair of runs and Felipe Lopez collected three hits to help the Diamondbacks post their fourth win in their last six games.

Tony Pena (3-0) picked up the victory with 1 2/3 scoreless innings in relief of starter Jon Garland, who held Milwaukee to two runs over the first 6 1/3 frames.

Friday's loss spoiled an outstanding start by the Brewers' Manny Parra, with the left-hander permitting just one run on three hits and notching a season- best eight strikeouts in six innings of work.

Milwaukee would love to get a similar mound effort tonight out of Braden Looper. Like Haren, the right-hander has gotten his 2009 campaign off to a strong beginning, having posted a 2.45 ERA through his first four starts, all of which have been Milwaukee wins.

The converted closer did not get a decision in Monday's 10-5 home triumph over Pittsburgh but kept his team in the game by battling through five innings. Looper allowed three runs (2 earned) on six hits and finished the night with a season-best seven strikeouts.

Looper had won consecutive starts prior to Monday's matchup and fired six shutout innings to defeat defending world champion Philadelphia in Citizens Bank Park on April 22.

A free-agent signee by the Brewers in the offseason, Looper has made 28 career appearances against Arizona, but only two have come in a starting role. Both came with St. Louis during the 2007 season and were no decisions, although he surrendered 10 runs (9 earned) in just 9 1/3 innings during those games.

The 34-year-old is 1-2 with 10 saves and a 4.08 ERA lifetime versus the Diamondbacks.

Milwaukee went 5-2 against Arizona in 2008, with a three-game sweep of the D'Backs at home from June 2-4. The Brewers are 11-5 in the series since the start of the 2007 campaign and 7-2 as the host over that time.