Kansas City, MO (SportsNetwork.com) - Victor Martinez went 3-for-5 with two RBI to lead an offensive barrage that fueled the Detroit Tigers' 8-2 rout of the Kansas City Royals at Kauffman Stadium.

The Tigers pounded out 14 hits and shelled Royals ace James Shields for eight runs in 6 1/3 innings to claim the opener of this three-game set and win for the third straight time overall. Every Detroit starter collected at least one hit, with J.D. Martinez finishing 2-for-4 with a pair of RBI and Alex Avila contributing a two-run homer.

Detroit also received seven solid innings from Rick Porcello (4-1), with the righty yielding just four hits and two runs while fanning six without a walk.

Shields (3-3), who entered the contest with a 2.03 ERA, was tagged for 12 hits and seven earned runs to have a three-start win streak halted.

Billy Butler had a solo homer and Omar Infante ended 2-for-4 with a run scored in the loss.

Shields worked his away out of bases-loaded jam in the second inning, but was hit hard in each of the next two frames as the Tigers erased an early 1-0 deficit.

A Torii Hunter single was followed by back-to-back doubles from Miguel Cabrera and Victor Martinez that put Detroit ahead in the third, and Avila made it a 4-1 lead an inning later with a towering homer to right-center that came after J.D. Martinez reached on a leadoff double.

The Tigers weren't finished in the fourth, as Andrew Romine and Ian Kinsler delivered consecutive singles before a double-play grounder from Hunter brought in another run.

"I wasn't locating my pitches, getting behind in the count today," said Shields. "I didn't do my job out there, bottom-line."

Porcello got off to a bit of a rocky beginning, as Infante tripled to right in the opening inning and crossed the plate on an Eric Hosmer sac fly to give Kansas City a quick 1-0 edge.

The Detroit starter later served up Butler's line-drive homer to left to begin the bottom of the fourth that brought the Royals within 5-2, then proceeded to set down the next 12 hitters to complete his stint.

"I was throwing first-pitch strikes," said Porcello. "I think that was the biggest key tonight, it was establishing the fastball early and getting ahead of guys."

Shields settled down to throw a perfect fifth and sixth, but gave up Victor Martinez's single that plated Kinsler in the seventh and left after loading the bases. A J.D. Martinez double off Kelvin Herrera knocked in two more runners to extend the margin to 8-2.