OAKLAND (AP) — Even though Max Muncy hasn’t gotten a lot of opportunities at third base, he knows he should have been better when given the chance.Muncy’s error helped key a three-run inning for Kansas City and the Royals went on to sweep the Oakland Athletics with a 5-3 victory Sunday.Muncy made just his eighth start of the season at third base as manager Bob Melvin wanted to get as many lefty hitters in the lineup as possible against Jeremy Guthrie.“It’s not an excuse to use,” Muncy said. “When your name is called you need to go in there and make the play. That’s all there is to it.”Jesse Chavez (4-7) was unable to bail out Muncy in the three-run sixth and Oakland dropped its third straight following a season-long five-game winning streak.“We were playing really good ball lately and this happens,” Muncy said.