John Butcher allowed four singles over 7 2/3 innings and the Minnesota Twins scored two unearned runs on a second-inning single by Ron Washington in defeating the Royals, 4-1, last night in Kansas City, Mo.

Butcher (11-8) walked two and struck out two as Minnesota (70-67) increased its lead in the West Division to two games over the second-place Royals (68-69).

The Twins, who ended a five-game losing streak, play in Kansas City today and Wednesday, then are host to the Royals for three games next week.

"You can't call this a big series yet," Minnesota Manager Billy Gardner said. "We've still got to play three games at our place. You don't want to get too up for anyone because there's still a month to go. But it's nice to get a win. We hadn't been scoring and we hadn't been winning lately. It was tough getting number 70."

Victory No. 70 equaled the Twins' total for 1983, when they finished fifth at 70-92.

Kansas City starter Bud Black (14-11) hit leadoff batter Kent Hrbek with a pitch in the second inning and shortstop Buddy Biancalana booted a two-out grounder by Tim Teufel. After Tim Laudner walked to load the bases, Washington singled.