KANSAS CITY (Interstat) -- Michael Wacha pitched seven scoreless innings, allowing two hits and striking out six, to lead the Kansas City Royals to a 5-1 victory over the Detroit Tigers on Saturday night at Kauffman Stadium. Wacha (4-2) retired the first 10 batters he faced and lowered his ERA. Bobby Witt Jr. hit an inside-the-park home run in the first inning, a line drive down the right-field line that eluded right fielder Kerry Carpenter, scoring Maikel Garcia for a 2-0 lead. It was Witt’s fifth homer of the season. Michael Massey added a three-run homer in the fourth inning, his third, scoring Carter Jensen and Jac Caglianone to make it 5-0. Detroit scored its only run in the eighth on an RBI double by Riley Greene. Burch Smith (0-2) took the loss for the Tigers, who managed just four hits. Kansas City had six hits. The Tigers fell to 18-22, while the Royals improved to 19-21 and will go for a series sweep Sunday. Attendance was 26,724. The game lasted 2 hours, 4 minutes.