Rookie Christian Friedrich and two relievers combined for a five-hit shutout Monday, staking the Colorado Rockies to a 4-0 whitewash of Arizona. Friedrich (4-1) won for the fourth time in six major-league starts, limiting the Diamondbacks to four hits while walking two and striking out four over seven innings. The left-hander came out for reliever Craig Breslow with two out and runners on second and third. Breslow got Todd Helton on a groundout to end the threat. Matt Belisle tossed a scoreless eighth and Adam Ottavino completed the shutout with a 1-2-3 ninth for the Rockies, who took the opener of a three-game set. Wilin Rosario went 2-for-4 with a solo homer and two RBI for Colorado. Joe Saunders (3-4) absorbed the loss for Arizona, yielding 11 hits over 6 2/3 innings. He was touched for four runs (three earned) while walking one and fanning three.