SAN DIEGO — The Colorado Rockies will add two young pitchers to their rotation this week, calling up Alex White and Christian Friedrich from Triple-A, according to multiple sources.

White will start for the Rockies on Tuesday and Friedrich will pitch as the starter Wednesday, both as part of a series against the Padres.

“It’s pretty obvious what they need here in terms of the rotation,” White said. “I hope to be one of the guys who can help out and do my part.”

White was acquired late last season from Cleveland in the Ubaldo Jimenez trade, but struggled in his call-up in 2011. He started this season with the Sky Sox.

Friedrich is a first-round draft pick of Colorado’s and will make his major-league debut. This season was his first in Triple-A.

Jhoulys Chacin was recently demoted from the Rockies starting rotation. And on Monday general manager Dan O’Dowd said Chacin will delay his assignment to Colorado Springs because of health issues.