SPORTSTICKER NL PREVIEW (ARIZONA-COLORADO) DENVER (Ticker) -- Red-hot Pedro Astacio seeks his fifth straight win tonight when he takes the mound for Colorado Rockies against the Arizona Diamondbacks. Astacio (4-3, 5.09 ERA) has pitched into the eighth innning in each start during his winning streak. His best outing during that span came at Arizona on Sunday when he threw a seven-hitter and allowed just an unearned run. Astacio is 1-1 in three starts at Coors Field this season and owns a 2-1 career mark against the Diamondbacks. Kurt Abbott went 3-for-4, falling a triple short of the cycle, with two RBI as the Rockies posted an 8-4 victory over Arizona on Thursday, snapping a four-game home losing streak. The Rockies are 6-9 at Coors Field. Colorado's Larry Walker brings a 20-game hitting streak into tonight's contest. His streak is the third-longest in Colorado history, trailing Vinny Castilla (23) and Dante Bichette (22). Brian Anderson (0-1, 9.58) makes his first start of the season for Arizona. Anderson won 12 games and made 32 starts for the Diamondbacks last season, but has appeared in eight games out of the bullpen this season. The lefthander's longest outing in 1999 came against San Francisco on April 16 when he worked 3 1/3 innings. Arizona has split four games on a seven-game road trip and is just 9-14 on the road. The Diamondbacks have the best home mark in the National League at 14-5. -=-=- 