SAN DIEGO — The Colorado Rockies got exactly what they needed to end a five-game losing streak — a win by a pitcher making his big-league debut and an offensive outburst.

Left-hander Christian Friedrich, a former All-American at Eastern Kentucky, pitched six solid innings to win his debut and Jason Giambi and Wilin Rosario hit RBI doubles off the top of the fences at Petco Park as the Rockies rallied to beat the San Diego Padres 6-2 Wednesday.

Friedrich helped stabilize a rotation that's struggled because of injuries and ineffectiveness. Friedrich (1-0) held San Diego to two runs, one earned, on six hits while striking out seven and walking one. He was Colorado's first-round pick in the 2008 amateur draft.

"I guess it's a dream come true," Friedrich said. "I struggled the last two years. To come up here and have some success, I know it's only one, but it feels great. It's a weight lifted off my shoulders. Now I can go out ... and do my thing."

With two starters on the disabled list, the Rockies called up Friedrich and Alex White to get them through this three-game series. White pitched well in a 3-1 loss Tuesday night.

"That, just like last night, was really refreshing to see," Manager Jim Tracy said. "I tip my cap to Christian Friedrich, knowing the work he has put in and the fact that what we saw today was the result of a lot of work on a lot of people's part in the organization. This kid worked really, really hard and he's gotten himself into a really good place."