Merrill was hit just above the left lip and was conscious and breathing when taken to Bayfront Medical Center, a Yankees spokesman said. Gene Monahan, the Yankees' head athletic trainer, went to the hospital with Merrill.
Batting practice halted for several minutes as an ambulance was called. Merrill then received a standing ovation from the crowd at Progress Energy Park, where the Yankees were scheduled to play the Tampa Bay Rays.
Bryan Hoch is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.