SEATTLE — Vladimir Guerrero is leaving a road trip and heading back to Los Angeles for further tests on an injured chest muscle.

Manager Mike Scioscia said an MRI Thursday revealed a strained pectoral muscle. The 34-year-old Guerrero was to fly to Los Angeles Wednesday night to see team orthopedist Dr. Lewis Yocum.

Yocum will determine whether the first player since Lou Gehrig to bat at least .300 with at least 25 home runs in 11 consecutive seasons will rejoin the Angels' road trip in Minnesota this weekend.

Guerrero played in all eight of the Angels' games as the designated hitter before sitting out Thursday night's game at Seattle.

He said he first felt discomfort during an exhibition against the Dodgers four days before opening day.