Texas manager Ron Washington said that Hamilton was fine until just before game time in Thursday's series finale against the Angels in Anaheim. He made it through stretching without a problem, but clearly wasn't himself doing some defensive work during batting practice.
"He took a ground ball, catch and spin, and lost his balance," Washington said. "Then he misjudged a fly ball. It's no big deal; everybody misjudges fly balls. But we decided we weren't going any further with him."
So while the Rangers flew up the coast to Seattle, Hamilton flew home to get some tests to see where he stands medically. The Rangers aren't expecting him to be in Seattle for the three-game set with the Mariners.
They are hopeful that Hamilton will play against the A's in a four-game set that starts Monday in Arlington, but that's up in the air.
"We're going to do all we can to ease his mind," Washington said. "Once he has peace of mind, he'll be fine."
Asked what he meant by "peace of mind," Washington said that once the tests are over and the medical crew can explain what's been happening, the veteran center fielder will be able to deal with it.
"He will play for us again (this season)," Washington said.
Hamilton had only missed 11 of the Rangers' first 149 games coming into the weekend.