SAN FRANCISCO -- Chris Iannetta says he won’t sleep much before Saturday’s game after Friday’s 18-inning 3-2 loss ended at 12:50 a.m. PT.

That’s not just because it’s a night-into-day game before a day game. It’s because Iannetta struck out four times in four at-bats. And when it most counted, he couldn’t keep his foot on the plate. The Giants’ winning run came on a bases-loaded grounder to center fielder Ian Desmond as part of a five-man infield.

Desmond had to move to his left to get the ball and was able to get off a decent throw.

“I tried to play it like a first baseman and my foot didn’t stay on the base,” Iannetta said. “I felt like I’d never played baseball before. I don’t think I’ll be sleeping much after this one.”

It didn’t help that the loss was Colorado’s seventh in a row and the 11th in the last 12 games. Still, manager Bud Black simply refused to feel down about the loss.

“It wasn’t a bizarre game; it was a great game,” Black said in response to a question about the bizarreness of the evening. “We played hard all the way. The Giants played hard. We’ll be all right after this.”

There is plenty of season left for the 3-11 Rockies. But it’s an open question as to how many games are left that will be more winnable than this one. At one point the Colorado bullpen retired 19 consecutive batters, but the offense could do nothing after two runs in the fourth inning.

“We battled; we battled hard,” Iannetta said. He played 10 innings after coming into the game as a pinch-hitter in the ninth. “We had some good at-bats, but we didn’t get the big hit when we needed it.”

Black said, “I thought we struck out too much [24 times], but we had better swings for the most part tonight than we’d been having.”

Brandon Belt doubled to start the bottom of the 18th -- just the Giants’ eighth hit -- and after Brandon Crawford was walked intentionally by Rockies reliever DJ Johnson, a long fly from Kevin Pillar moved Belt to third base.

Another intentional walk loaded the bases for Erik Kratz, and with Colorado going to a five-man infield by vacating center field, Kratz dribbled a broken-bat grounder toward second base. Desmond got a throw home, but Iannetta’s foot was off to the first-base side of the plate by a couple of inches as Belt slid home to end the game after five hours, 35 minutes.

The Colorado bullpen retired the first 19 Giants batters it faced, but Black said that shouldn’t impact Saturday’s game in which Kyle Freeland faces the Giants’ Madison Bumgarner. Only Scott Oberg and Harrison Musgrave pitched two full innings.

“We’ll be all right there,” Black said. “We’ll be OK.”

Hampson ignites offense

It took a trip to the City by the Bay to get second baseman Garrett Hampson’s swing going. It was Hampson’s first extra-base hit of the year, a leadoff triple in the fourth, that got the dormant Rockies offense unshackled. Colorado scored two runs to take its first lead in a game since April 3.

Hampson had just three hits in his first 30 at-bats for the Rockies, but Colorado had few options with Ryan McMahon out with a left elbow strain. Thursday saw Hampson deliver his first two-hit game of the year in a 1-0 loss to San Francisco, a prelude to his impactful triple Friday.

Colorado starter Chad Bettis did what he could to hold that lead, aided in no small part by a double play started by Hampson in the bottom of the fourth to steal an RBI hit from Evan Longoria. Even then it came with men on first and third as the Giants got their first run.

They’d get their second run two innings later when a Pablo Sandoval pinch-hit double and a slow infield single from Steven Duggar set up Joe Panik’s sacrifice fly off reliever Mike Dunn.