Aaron Boone isn't sure New York Yankees outfielder Clint Frazier will be able to play baseball again after he was pulled from a Minor League rehab assignment Monday amid continuing issues with his vision.

"We'll see," Boone said when asked whether Frazier would play again. "Obviously, he's been through a lot and been through a lot of seeing a lot of people and a lot of testing and everything. We'll just try and continue to follow and support him where we can. But as of right now, a little holding pattern. I know he feels well today, so we'll just see."

Frazier, 26, began a minor league rehab assignment last Tuesday after missing nearly six weeks because of dizziness and other symptoms consistent with vertigo.