Surprise, Ariz. ? Madison Bumgarner is struggling to regain his World Series form.

The Kansas City Royals, last in the American League Central last season, battered Burgarner for eight runs on 10 hits, six of them for extra-bases, in beating the Giants, 15-3, Friday night in spring training action. Last October in Game 4 of the World Series, Bumgarner allowed three hits in eight scoreless innings in beating Texas.

Friday, Bumgarner retired nine of the first 10 batters he faced before yielding eight runs.

“The first three innings I was on the corners and down, too,” Burgarner said. “At the end, I don’t know if it was fatigue, but I felt good. I think the biggest difference was I started missing over the middle and up, and the ball was flat. Sometimes you can do that and get outs, but they were putting really good swings and hitting the ball hard.”

The 21-year-old lefty is 1-4 with a 7.17 earned-run average in seven spring training games. He’s allowed 29 hits in 211/3 innings, while striking out 25.

Alex Gordon led the Royals offense with three hits, including two doubles, and drove in four runs, raising his RBI total to 20. Kila Ka’aihue had two doubles and three RBIs, while Jeff Francoeur homered, his first since the first exhibition game. Melky Cabrera went 2-for-3 to raise his Cactus League-leading average to .490.

The Giants had nine hits in the first three innings before the Royals had one. Royals right-hander Vin Mazzaro allowed three runs on nine hits in the first three innings.