Kansas City, Mo. ? Pounding out 20 hits and walking eight times, the rested Cleveland Indians belted Kansas City and put Vin Mazzaro in the record book as pitching the worst game in Royals history.

Mazzaro gave up 10 runs in the fourth inning and became the third pitcher since 1947 to allow 14 runs in a game, according to STATS LLC. He also became the newest addition to the Triple-A staff in Omaha, where he was demoted to immediately following the 19-1 loss by the Royals on Monday night.

“It’s tough. It was a tough game,” said Mazzaro, whose earned-run average skied to 22.74. “Some of the plays didn’t go my way. It’s a funny game. You’ve just got to keep battling and attack the zone.”

After the brutal fourth inning, Mazzaro allowed four more in the fifth before he was removed.

“We do have a few guys who see a lot of pitches,” said Cleveland manager Manny Acta. “On those days when the pitchers are not on top of their game, these guys can really work a number on them.”

Mazzaro was definitely not on top. The 25-year-old right-hander was charged with 14 runs on 11 hits in 21/3 innings and erased the Royals’ record of 11 runs allowed in a game, which had been done three times.

Michael Brantley and Matt LaPorta each had four RBIs in the Indians’ biggest offensive outburst since scoring 22 runs at New York on April 18, 2009. Hafner and Orlando Cabrera each had three RBIs.

LaPorta reached base five times with a walk and four hits.

“I definitely think it’s contagious,” LaPorta said. “You see a couple of guys in front of you get a hit and you want to be right there, you want to be able to drive them in. And I think it’s the same way, guys behind you want to drive you in.”

At least Mazzaro didn’t get the loss. That went to starter Kyle Davies (1-6), who left after walking the bases full in the first inning and retiring only one batter.