SEATTLE (AP) - Yuniesky Betancourt hit 1 of the Royals' four home runs in his return to Seattle and Kansas City powered past the Mariners 8-4 Thursday night.
Brayan Pena, Alberto Callaspo and David DeJesus also homered for the Royals in their first four-homer game this season. The last time they hit four was May 23, 2007, against Cleveland.
It was enough support for Kyle Davies (5-9), who went six innings to earn the victory. He allowed five hits and two runs, walking three and striking out five.
Doug Fister (1-1) worked six innings for the Mariners, allowing five runs on five hits. He walked one and struck out five.