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AP - Sports

Each spot in the Colorado Rockies' lineup seems to pose a threat to the opposition as their offense continues to produce night after night.

The Arizona Diamondbacks are hoping rookie Mike Bolsinger can finally slow them down.

Visiting Colorado looks to deal Arizona a fourth straight loss as this series continues Tuesday night at Chase Field.

The Rockies (15-12) lead the majors with a .295 average and are second with 148 runs. Seven of the eight positions players who started Monday's 8-5 win are hitting at least .280, and three are batting at least .351.

Troy Tulowitzki went 3 for 3 with a solo homer, two doubles and three RBIs to raise his average to .366. Nolan Arenado went 2 for 4 to extend his hitting streak to a baseball-best 18, and Justin Morneau is batting .388 during his own 12-game run after hitting a two-run homer.

Colorado has scored at least eight runs nine times.

''We played good offensive baseball,'' manager Walt Weiss said. ''Tulo had a (great) night and we played well offensively.''

Tulowitzki bounced back after going 1 for 12 in a three-game series against the Los Angeles Dodgers.

''He's one of the best players in baseball, so you expect that,'' said left fielder Carlos Gonzalez, one of the only Rockies struggling with a .234 average.

Monday's defeat marked another low point for Arizona (8-21), which is off to the worst start in franchise history in large part due to a majors-worst 5.27 ERA. The Diamondbacks allowed at least eight runs for the 10th time and dropped to 0-15 when giving up at least six.

''They are a good-hitting ball club,'' manager Kirk Gibson said of Colorado. ''They are hard to contain. You have to make good pitches on them.''

Bolsinger (1-1, 5.27 ERA) will take the mound after a stellar effort in his second major league start Thursday, when he gave up an unearned run and struck out seven in 6 2-3 innings of a 5-2 win over the Chicago Cubs.

The rookie had allowed nine runs and 13 hits in seven innings over one start and one relief appearance prior to earning his first victory.

"Bolsinger, he threw the ball well, he made good pitches when he needed it," catcher Miguel Montero said. "He was working ahead in the count. He mixed his breaking ball, changeup, fastball, it was good."

The right-hander will get his first look at the Rockies, who hope to get a better start from Tyler Chatwood.

Chatwood (1-0, 4.26) had a shaky outing Wednesday, giving up seven hits and five runs - all on three homers - while walking four in Colorado's 12-10 loss in 11 innings to San Francisco. It was a stark contrast from his previous outing, when he allowed an unearned run and two hits in seven frames of a 12-1 win over Philadelphia.

"I really made two mistakes. I walked four guys, but two mistakes," Chatwood said. "We didn't execute many pitches."

The right-hander had the same problem with his command when he last faced the Diamondbacks on Sept. 13, walking a career-worst six and throwing 110 pitches while giving up two runs over 4 2-3 innings of the Rockies' 7-5 win.

Chatwood is 2-0 with a 3.65 ERA in two starts and one relief appearance against Arizona, which has dropped 14 of 16 at home this season.

The Rockies had lost seven of eight meetings in Arizona prior to Monday's victory.

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