DENVER -- Rockies right-hander Germán Márquez has seen enough of the Giants. And next time he’s supposed to start the first game of a doubleheader, calling in sick might be a good idea.

About the best Márquez can say about the Giants’ 10-run first inning Tuesday afternoon was he was charged with only eight of the runs -- on six hits and two walks -- and experienced just two-thirds of it.

Jhoulys Chacín replaced Márquez and was greeted by a Brandon Belt grand slam and a Buster Posey homer before the frame was done. The Giants rolled to a 12-4 victory at Coors Field.

• Box score

Raimel Tapia’s fourth-inning grand slam served as the Rockies’ bright spot. It was his third career grand slam.

“Give credit to the Giants -- they’re a good-hitting team, I didn’t command the ball as well and they took advantage of that,” Márquez said in Spanish.

The only good news for Márquez -- who has a 13.06 ERA with 16 hits allowed in 10 1/3 innings in three starts this year against the Giants -- is the teams don’t meet again until a four-game set at San Francisco’s Oracle Park from Aug. 12-15. Just last Wednesday, Márquez walked in two runs during a four-run second inning and lasted four innings in a 7-3 loss in San Francisco.

“Mentally, I don’t really focus on that,” he said. “It’s just baseball. I treat each team the same.”

After the last start against the Giants, Márquez said his command issues were boiled down to “a little thing” in his delivery. “Day to day, I’m still working on those,” he said Tuesday.

As unkind as the Giants have been to Márquez in 2021, it seems scoring big in first games of doubleheaders against him is growing into a tradition. On July 15, 2019, the Giants scored 11 runs on 11 hits, including two home runs, over 2 2/3 innings in a 19-2 blowout.

“There's definitely some things we have to take care of as far as command,” said Rockies manager Bud Black, who visited Márquez during the inning in a futile attempt to help him settle. “There are too many walks [21 in 33 1/3 innings this year]. On a scouting scale, that's not good. Overall, we got to get the ball in better spots with the fastball. Fastball command overall the season has been lacking. The breaking ball today was inconsistent. And he couldn't get out of it.”

The top of the first is etched in both teams’ record books for double figures in one inning.

For the Rockies, Tuesday marked:

• The seventh 10-run inning against them in club history, and first since June 21, 2017, against the D-backs (10 in the top of the fourth).

• The second 10-run first inning against the Rockies. The other was 10 by the Dodgers in the bottom of the first on April 26, 2008.

For the Giants, Tuesday was:

• The first time since scoring 10 in the bottom of the fourth against the Pirates on Sept. 7, 2008.

• Their fifth double-figure scoring in the first inning. The first four came when the franchise was based in New York. The most-recent was June 29, 1967, when the Giants scored 11 in the top of the first against the Cardinals in a game started by Hall of Famer Bob Gibson (seven hits, nine runs in two-thirds of an inning).