KANSAS CITY, Mo. (AP) _ Rookie Mark Quinn kept up his second-half surge with two homers and a double, driving in four runs as the Kansas City Royals beat the Baltimore Orioles 7-6 Friday night.

Quinn's 17 homers and 56 RBIs lead all American League rookies. Since the All-Star break, he is batting .359 (42-for-117) with six homers and 18 RBIS.

Mike Sweeney also homered for the Royals, who won despite tying a season high with four errors.

Kansas City broke open a 4-all game with three runs in the seventh.

Johnny Damon's RBI double gave the Royals a 5-4 lead and Sweeney's two-run homer with two outs and chased starter Mike Mussina (7-12). Damon is the only player in the AL with more hits (62) than Quinn since the break.

Mussina gave up 11 hits in 6 2-3 innings, striking out three without giving up a walk.

Dan Reichert (6-6) gave up four runs on four hits over seven innings, with three walks and four strikeouts. He is 3-0 with two no-decisions in his last five starts.

Ricky Bottalico pitched the ninth for his 13th save. He gave up Melvin Mora's RBI single with two outs.

Jerry Hairston, recalled Friday from Triple-A Rochester, gave Baltimore a 1-0 lead with a leadoff homer in the first inning.

Quinn doubled home Jermaine Dye in the second to tie it. Dye also had three hits.

The Orioles went up 3-1 in the third with the help of the first of two errors by Royals third baseman Joe Randa.

With two outs, Delino DeShields hit an RBI triple that fell out of a running Dye's glove in right field. He then scored when Randa threw high to first on Albert Belle's grounder.

Quinn's two-run homer made it 3-all in the fourth. After Belle's RBI double in the fifth put Baltimore up 4-3, Quinn answered with his second homer, a solo shot in the sixth.

After the Royals' three-run seventh, Jeff Conine's RBI single in the Baltimore eighth cut Kansas City's lead to 7-5. That hit followed errors by shortstop Rey Sanchez and catcher Gregg Zaun.

DeShields scored three times and had three hits.

Notes: Reichert threw his 14th wild pitch. That tied him with Detroit's Hideo Nomo and Minnesota's Hector Carrasco for the most in the AL. ... Before Friday, Randa had committed only one error in his previous 34 games. ... Kansas City is 4-0 against the Orioles this season.