A struggling Round Rock bullpen received a much-needed boost from starter Ryan Feierabend against the Colorado Springs Sky Sox.

The left-handed starter improved to 2-0 and dropped his ERA from 5.87 to 3.95 with one earned run in six innings (six hits, one walk, three strikeouts).

As a result, the Express never trailed en route to a 6-3 win in Game 1 of Monday's scheduled Pacific Coast League doubleheader.

Due to a wind chill in the low 20s, Game 2 was postponed until the Express return to Security Service Field. The teams will play a single game July 25 and play two seven-inning games starting at 4:05 p.m. July 26.

Feierabend did a good job keeping the Sky Sox off the bases until two outs were already on the scoreboard in the third, fourth and fifth innings.

"He did a really good job locating his off-speed pitches," Colorado Springs center fielder Jason Pridie said. "He got us swinging at some pitches. He did a good job mixing things up."

His performance came after both teams scored 10 or more each in two straight games before Sunday's postponement.

In contrast to Feierabend (one walk, three strikeouts), Colorado Springs left-hander Yohan Flande (0-2, 10.80 ERA) struggled almost immediately. He threw 46 pitches in the first inning while the Round Rock batters extended their at-bats with 12 foul balls.

Flande fell behind 2-0 on three straight two-out singles and a walk as Round Rock came within one batter of going through the order.

Round Rock added another run in the second off Flande before he gave way to reliever Manny Corpas, who was touched for three runs after an RBI hit by Brett Nicholas was followed by a two-run single by Jared Hoying for the Express (7-4).

Colorado Springs made it 3-1 early when shortstop Paul Janish drove home second baseman Drew Garcia after the shortstop opened the second inning with a double.

Sky Sox reliever Rob Scahill kept the Express from pulling away, allowing one hit in three innings' work to keep Colorado Springs (5-6) within striking distance entering the seventh.

Then, the Express bullpen, which has allowed an earned run in every game so far, continued its struggles. Reliever Ben Rowen hit Janish to start the seventh, which Pridie later cashed in with a one-run double for a 6-2 margin. Matt McBride added a sacrifice fly for the final Sky Sox run.

Roster moves

The Rockies sent left-handed pitcher Brett Anderson to the 15-day disabled list with a fractured left index finger (retroactive to April 13). . Colorado recalled outfielder Corey Dickerson from Triple-A. Outfielder Charlie Culberson was en route to Colorado Springs on Monday. He is scheduled to play on Tuesday against Oklahoma City.