Tyson Ross is cemented among the list of pitchers with no luck at Coors Field.

Unlike others who have struggled in the hitter-friendly ballpark, Ross has pitched well but hasn't received much help from his own offense.

The San Diego Padres right-hander looks for some rare run support in Friday night's series opener with the Colorado Rockies.

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Since joining the Padres (54-61) in 2013, Ross has an 0-4 record in four starts in Denver. Ross pitched to a 3.92 ERA in those four outings - much better than the MLB average of 5.22 since the start of the 2013 season - but his offense provided him with just three combined runs at the offense-friendly field. It's the fewest runs of support among the 27 pitchers who have made at least four starts at Coors since 2013.

Colorado's lineup hasn't quite been there for Ross this season, either. Ross (8-9, 3.39 ERA) has won all six starts that he received more than three runs, compared to a 2-9 mark at three runs or less.

His last two outings have seen both sides with a 13-5 win over Milwaukee on Aug. 3 and a 4-2 loss to Philadelphia on Saturday. Ross started shaky in both, allowing two first-inning runs before settling down.

He retired the final 14 batters he faced against the Phillies.

"Sometimes you start off rough, sometimes you finish rough," said Ross to MLB's official website. "It's all about making adjustments, coming out the next inning and settling down and finding ways to get outs."

San Diego snapped a six-game losing streak with two home wins over Cincinnati to start the week, but they were denied a sweep with Wednesday's 7-3 loss. The Padres, who have totaled 12 runs in their last five losses, have won seven of nine games against the Rockies this year.

Colorado (47-66) will look to Yohan Flande (2-1, 3.86) to snap its own four-game skid. Flande has jumped up and down from the minors throughout the last two seasons, and he spent stints in May and July out of the Rockies' bullpen.

He was inserted into Colorado's rotation in late July, though, and he has a 3.68 ERA three starts - all on the road. The left-hander picked up his first career win July 28 and then added another in an emergency extra-inning relief appearance on Aug. 5.

Due to that bullpen outing, Flande lasted just 4 2-3 innings on Sunday against Washington. He served up three home runs, surpassing the two he had surrendered over 28 innings in 10 previous outings this year.

"He's a strike-thrower - that's what he does," Colorado manager Walt Weiss said. "He sinks the ball and he's got a good changeup."

Flande went 0-2 with a 5.40 ERA in two starts against San Diego in his 2014 rookie season.

Colorado left fielder Corey Dickerson has four hits in 11 at-bats against Ross in his career, including a home run and double.

Carlos Gonzalez, who is 1 for 7 with three strikeouts lifetime versus Ross, is mired in an 0-for-12 slump. He is also 0 for 12 at home against the Padres this season, but is batting .412 with six homers and 14 RBIs in eight games at Coors since the All-Star break.