That slide could very well continue Tuesday night as San Diego faces a pitcher that has won five straight starts and hasn't lost in more than two months, as Colorado will send Jhoulys Chacin to the mound.Already missing Troy Tulowitzki and Dexter Fowler, Carlos Gonzalez was also unavailable Monday after leaving Sunday's 6-1 loss at Arizona with a sprained middle finger. It's not clear when the NL home run leader will return."I don't feel good enough to play, but I'm not waiting to feel 100 percent," Gonzalez told the team's official website. "I want to feel good enough to go out and play for my team."His team didn't need him in the series opener, though, winning 4-2 as Wilin Rosario went 2 for 5 with two RBIs and Michael Cuddyer also was 2 for 5.The Padres' losing streak hit 10, the first time that's happened since a 10-game skid Aug. 26-Sept. 5, 2010. San Diego (40-50), which dropped a team-worst 13 straight in 1994, has scored 25 runs during the slide.Chacin (8-3, 3.74 ERA) has posted a 2.10 ERA in his past five outings, though he'd surely like to improve on a mediocre performance his last time out. He matched a season high by giving up nine hits and allowed four runs over 5 2/3 innings of a 9-5 victory over the Los Angeles Dodgers on Thursday.The right-hander has gone nine starts since his last defeat May 16. He had posted a 1.26 ERA in his previous four games and hadn't allowed a run in 15 innings of the last two."Wasn't my better game," Chacin said after beating Los Angeles. "But the team picked me up, scored runs for me."Former Colorado left-hander Eric Stults (6-7, 3.70) gets the nod for San Diego, having defeated the Rockies (43-47) at Coors Field on June 8. He held them to two runs -- one earned -- over seven innings of a 4-2 victory.Stults, though, has given up 10 runs in eight innings over his last two starts -- both on the road -- while suffering his first back-to-back losses of the season. He had gone 2-1 with a 1.83 ERA in his previous six outings.Perhaps returning to San Diego will help Stults, as he's 3-0 with a 1.41 ERA in his last five home starts.Chacin won his first two starts against the Padres this year, giving up three runs in 11 2/3 innings, then didn't record a decision after allowing five runs in 5 1/3 innings of a 6-5 loss June 6. He's 4-1 with a 3.38 ERA in seven career starts versus San Diego.