Boston, MA (Sports Network) - Yuniesky Betancourt's grand slam capped a seven- run fourth inning, as Kansas City outslugged Boston, 12-5, in the second of four between the teams at Fenway Park.
Mitch Maier finished with a two-run homer, three hits and three RBI for the Royals, who have won three in a row after losing three straight.
David DeJesus added four hits and drove in a pair for Kansas City, which came into the game leading the AL in batting average at .278 and pounded out 20 hits.
Kyle Davies (4-3) worked five innings and picked up the win despite allowing seven hits and five runs.
Victor Martinez hit a two-run homer and drove in four for the Red Sox, who lost for just the third time in their last 10 outings.
Tim Wakefield (1-3) was torched for season-highs of 12 hits and nine runs, with three walks over 3 2/3 innings.
The Royals blasted away on Wakefield in the fourth, tacking on seven runs to assume a 9-5 advantage. Jason Kendall began the surge with a dribbler to the mound, then Scott Podsednik singled to right. Mike Aviles and DeJesus hit consecutive RBI singles, then later in the frame, Billy Butler scored on a wild pitch with the bases loaded to tie the game.
Maier drew a walk to reload the sacks and Betancourt reached the Green Monster seats in left to cap the burst.
Podsednik scored on a wild pitch in the seventh to put the visitors in double digits, and Maier's two-run shot into the bullpen in right made it 12-5 for the Royals in the eighth.
Sox utilityman Bill Hall was called on in the top of the ninth and pitched a scoreless frame, while Dusty Hughes turned in two scoreless innings to lock up the win.
Boston scored three times in its first turn at the plate, thanks to an RBI single from David Ortiz and a two-run double to deep center by Martinez.
Kansas City countered with a pair in the third on a DeJesus double and single from Maier, but Martinez hit a two-run shot in the home half for a 5-2 game.
Betancourt hit his second career grand slam...Prior to the game, the Red Sox placed outfielder Jacoby Ellsbury on the 15-day disabled list with a chest contusion that has kept him out of action since early April...The Sox recalled pitcher Scott Atchison from Triple-A Pawtucket to fill the roster spot...Wakefield's previous season-high in hits came in a loss at Minnesota on April 15, when he surrendered 10. The veteran knuckleballer gave up a previous-high of six earned runs in a 7-6 win over Texas on April 20.