KANSAS CITY, Mo. -- Rick Porcello is already in his sixth full season in the big leagues, which makes it all the easier to forget that the Tigers right-hander is still just 25 years old. "I do think hes still learning himself a little bit," Detroit manager Brad Ausmus said after an 8-2 win over the Kansas City Royals, a game that Porcello dominated for seven innings. "Rick has really matured dramatically over his time here," Ausmus said. "You have to remember the guy is pretty young. You think hes older because hes been in the starting rotation." Porcello (4-1) gave up a sacrifice fly to Eric Hosmer, a solo homer to Billy Butler and little else Friday night. He wound up allowing four hits while striking out six without a walk. "Throwing first-pitch strikes I think was the biggest key tonight," he said. "Being ahead 0-1 instead of 1-0 is huge. You can go a lot of different ways when you do that." Victor Martinez had a pair of doubles and drove in two runs, and J.D. Martinez and Alex Avila also drove in two runs apiece as the Tigers won their fourth straight against the Royals. Meanwhile, Shields (3-3) allowed eight runs -- seven of them earned -- on 12 hits, a walk and a hit batter in 6 1-3 innings. It was the worst outing for the Royals ace since last September, when Shields allowed 10 runs in another lousy start against the Tigers. "I threw some good pitches. Thats a good hitting ball club over there," he said. "I wasnt locating my pitches. I was getting behind in the count. I didnt do my job out there, bottom line. Ive got to do a better job of getting outs. Its just one of those games." As if that wasnt bad enough, the Royals also lost All-Star catcher Salvador Perez when he fouled a pitch off his shin in the seventh inning. He was listed as day to day with a bruise. Shields first got into trouble in the second, when he loaded the bases but escaped the jam unscathed. But things only got worse in the third, when a single by Torii Hunter and back-to-back doubles by Miguel Cabrera and Victor Martinez gave Detroit a 2-1 lead. They never gave it back the rest of the game. J.D. Martinez kept the onslaught going when he led off the fourth with a double, and Avila followed by hitting the first pitch of his at-bat for his first homer of the season. Detroit added another run later in the inning when Andrew Romine reached third on an error by the Royals Mike Moustakas, and then scored on a double-play groundout. Butler provided the only bright spot the rest of the way for Kansas City, guiding a line drive over the fence in left field for his first homer of the season -- and the first by any hitter batting in the cleanup spot in the Royals lineup. "I knew I hit it good. I didnt know if it was high enough to get out," Butler said. "I knew I hit it hard, but didnt hit it very high. I couldnt see if it was fair or foul. I knew it was really close, too." Shields was finally pulled in the seventh, allowing another run and leaving the bases loaded while recording one out. Reliever Kelvin Herrera gave up a double to J.D. Martinez that brought in two more runs and gave the Tigers an 8-2 lead. That was plenty of support for Porcello, who had been miserable in the month of April until this season, when he went 3-1 with a 3.96 ERA. He kept that momentum going against Kansas City, a team he oddly never faced last season, retiring his final 12 batters. "Hes been throwing the ball great all season long," Victor Martinez said. "Hes showing hes young but he knows what hes doing out there. Hes giving us a great chance to win ballgames." NOTES: The Tigers announced the signing of RHP Joel Hanrahan on Friday. The former All-Star underwent Tommy John surgery last May after nine appearances for the Red Sox. ... The Royals put LHP Bruce Chen (bulging disc) on the DL and recalled RHP Aaron Brooks from Triple-A Omaha. ... 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Xavier Woodson-Luster Jersey .Y. - Phil Varone was the lone scorer in the shootout as the Rochester Americans edged the Toronto Marlies 3-2 on Sunday in American Hockey League action.CHICAGO -- The Los Angeles Angels acquired left-hander Rich Hill from the Boston Red Sox in return for cash considerations on Tuesday. In 25 relief appearances for Triple-A Pawtucket this season, Hill posted a 3.23 earned run average and opponents hit just .206 against him. He struck out 45 batters and did not allow a home run in 39 innings. He had a July 11 opt-out date in his contract.dddddddddddd The plan called for the 34-year-old Hill to be a left-handed specialist out of the bullpen, Angels manager Mike Scioscia said. In 46 at-bats this season, lefties batted .196 without an extra-base hit against him. The Angels optioned Michael Kohn to Triple-A Salt Lake City to create a roster spot.