The Rangers expect to be without white-hot third baseman Adrian Beltre for at least part of a six-game trip that begins Tuesday at Boston.

Beltre missed his first game of the season Sunday after tests Saturday night showed that he has a slight strain of the left hamstring. In 2011-12, Beltre missed 43 games because of problems with the left hamstring.

Manager Ron Washington said Beltre could play in the series opener at Boston but is more likely to return Thursday. Washington probably will hold Beltre out of at least one game at Toronto to keep him off the hard artificial turf of Rogers Centre.

“The thing is, he’ll be back in there soon,” Washington said.

Beltre, batting .421 during a current eight-game hitting streak, indicated the injury is not major and he expects to return quickly. Since he joined the club in 2011, the Rangers have a .603 winning percentage (199-131) when Beltre starts and a .500 winning percentage (25-25) in all other games.

Jeff Baker replaced Beltre at third and made a wide throw to the plate as Kansas City scored the tying run in the eighth inning.

Washington replaced Baker with rookie Leury Garcia in the ninth.