Opening day for Matt Daley, Josh Fogg and Carlos Gonzalez was spent shivering in front of an “announced” crowd of 2,414 at Security Service Field, where the 49 degrees at first pitch seemed balmy compared with the later innings.

Fast forwarding a bit, the trio went to work Monday at Coors Field before 40,444 fans hot with the frenzy of a pennant run.

The 100 days in between brought enormous change to the only three current members of the Rockies to start the season in Colorado Springs — but the experience has been vastly different for each.

“I thought I could pitch at this level,” said Daley, whose major league debut came April 25. “But to actually go out and get some success, it’s absolutely a big relief because you’re always a little worried about that.”

Daley has limited opponents to a .202 average in 25 appearances.

“Down in the Springs he was our best pitcher out of the bullpen at the start of the year, and he’s just carried it right into what he’s done up here,” said Tom Runnells, who was promoted to Rockies bench coach May 29 after 3½ years as the Sky Sox manager.

While Daley’s success translated, Fogg seemed to need the call-up to find consistency — though it’s come in a role foreign to him.

“I’m in a spot where I’ve just got to do whatever they ask me to do,” said Fogg, who had worked out of the bullpen only 26 times in 219 appearances prior to this season. “If they want me to come in in the second, I’ll be in in the second. I’m a pitcher. Whenever they tell me to pitch, I’ll go out there.”

His versatility has manager Jim Tracy calling Fogg a “staff saver.”

“It says a lot about our organization that we’ve been able to call upon so many different people and they are all making legitimate contributions in helping us win games,” Tracy said.

Winning is the one thing that’s coming easy for Gonzalez, who is struggling for the second year in a row to hit big-league pitching.

The 23-year-old left fielder is hitting .213 through 31 games with 27 strikeouts — one every 3.5 at-bats.

“I know the numbers are going to get better with the more at-bats I get,” said Gonzalez, who led the minor leagues in RBIs when he was called up June 5. “I know I’ll be able to do some damage.”

The Rockies are 21-4 in games Gonzalez has started — a testament to his defense beside speedy rookie Dexter Fowler.

“It’s like having two center fielders out there, it’s cool,” Fowler said.

Still, the organization wants more from one of the key components of the Matt Holliday deal.

“His defense and speed are top-notch and are really helping us out,” general manager Dan O’Dowd said. “But we do have to get him going offensively.”

As for Runnells, 17 years removed from his last run in the majors as Montreal’s manager, he refuses to take credit for the wins that have followed him this year. The Sky Sox were 28-18 when he left and the Rockies are 31-15 since he arrived.

“The whole season has been great,” Runnells said. “But let’s hope we can say that at the end of the year. That’s what matters.”

If that comes to pass, a certain trio might again take the field in blustery conditions — but they’ll have much more company.

Matt Daley has limited opponents to a .202 average in 25 appearances since his Rockies debut April 25. Photo by AP PHOTO