Kansas City Royals starting pitcher Vin Mazzaro (32) catches the ball from an infielder during his nightmarish outing against Cleveland Monday night. Mazzaro was touched for 14 runs in the worst pitching performance in club history.

KANSAS CITY, Mo. — Vin Mazzaro’s painful journey Monday night took him all the way from the bullpen to the minor leagues, with a stop in that section of the team record book where nobody wants to be.

It was not a good night for the 25-year-old right-hander.

He pitched what the raw numbers will say was the worst game in the history of the Kansas City Royals: 14 runs allowed, including 10 in a nightmarish fourth inning. Mazzaro erased the Royals record and was demoted to Triple-A Omaha immediately after Cleveland’s 19-1 victory.

“It’s tough. It was a tough game,” said Mazzaro, whose ERA rose to 22.74.

Mazzaro, the third Royals pitcher on the night, was charged with 14 runs on 11 hits in 2 1-3 innings, becoming the third major league pitcher since 1947 to allow 14 runs in a game, according to STATS LLC.

Before Mazzaro, the only pitchers since 1947 to get clobbered for 14 runs were Milwaukee’s Bill Travers in 1977, and Oakland’s Mike Oquist in 1998 against the Yankees.

But those were starters.

No reliever had given up 14 runs in the major leagues since 1942, when Lester McCrabb did it for the Philadelphia Athletics, STATS said. The last pitcher to give up 10 runs in an inning was Texas’ Scott Feldman against the Red Sox on Aug. 12, 2008.