"We liked what we saw yesterday," Girardi said. "We like Gardy at the top of the order as well. It just gives us some options, and without Tex in the lineup, we have to change a little bit."
Ellsbury went 1-for-5 with an RBI in the Yanks' 6-4 win over the Blue Jays on Sunday in Toronto, and he entered Monday with seven hits in his last 14 at-bats.
Girardi said that the Yankees had a good idea of what their lineup would be entering the season, but losing Teixeira forced them to re-evaluate. Teixeira had an MRI exam on Monday morning in New York to determine the extent of his hamstring strain.
"When someone gets hurt, you have to adjust," Girardi said.
Bryan Hoch is a reporter for MLB.com. Follow him on Twitter @bryanhoch and read his MLBlog, Bombers Beat. This story was not subject to the approval of Major League Baseball or its clubs.