MINNEAPOLIS — Erik Kratz had played in only five games for Kansas City since being acquired from Toronto in a trade on July 28.
But the big guy always stayed ready and that discipline paid off Monday night to keep the Royals rolling.
Kratz homered twice after replacing an ailing Salvador Perez, and Jason Vargas pitched seven strong innings to lead the first-place Royals to a 6-4 victory over the Minnesota Twins.
"You put your work in before the game as a bench guy to be ready to go in," Kratz said. "Some people could say well, Salvi plays every day, so why not take a day off? In my opinion, what’s the point of taking a day off if that might be the day you come in and play?"
Vargas (10-5) allowed one run on four this and struck out three, but had his scoreless innings streak snapped at 17 when Oswaldo Arcia hit a solo homer in the seventh. Perez had two hits and two RBIs before leaving in the seventh because of discomfort in his right knee, helping the Royals win for the 21st time in 26 games.
Kansas City extended its lead over the idle Detroit Tigers in the AL Central to two games.
Trevor May (0-2) gave up three runs on seven hits and walked four in 4 2/3 innings for the Twins.
When Perez left, Kratz came in as a pinch hitter and broke his bat on a pitch from Anthony Swarzak, but still managed to muscle it over the wall in left field for a 4-0 lead. Kratz added a solo shot to center in the ninth for his first multihomer game.
The drives proved even more important when Trevor Plouffe hit a three-run homer off Aaron Crow in the ninth inning.
"It’s great to help the team out when you do get in there for any bench guy," Kratz said.
Greg Holland came on for his 38th save in 40 tries. Josh Willingham had three hits and Alex Gordon and Billy Butler each had two for the Royals, who have won eight straight series for the first time since 1991.
May made his major league debut on Aug. 9, and it was a rough one. He walked seven batters in two innings and gave up four runs. He breezed through four innings of his home debut, but walked the bases loaded in the fifth.
Perez followed with a two-run single and Butler added an RBI single to give the Royals a 3-0 lead.
That was enough for Vargas, who has dominated the Twins this season. He retired 10 in a row from the second through sixth while his offense built him a cushion.
"Salvi’s a huge part of our team, but we have to keep him healthy and keep him in it for the long haul," Vargas said. "For Kratz to come in and step up and go big fly twice was pretty nice, especially when they were able to extend the game a little bit there. Those two home runs really counted."