Rand, Tigers assistant athletic trainer Doug Teter and first-base coach Omar Vizquel attended to him as he lay on the ground, seemingly shaken. Rand and Teter helped him off the field as the crowd, which had noticed the fall, quietly cheered.
The bat boy, later moving around on crutches, will be examined by Pirates team doctors on Tuesday, Rand said, and will undergo an MRI exam.
Jason Beck is a reporter for MLB.com. Read Beck's Blog and follow him on Twitter @beckjason. This story was not subject to the approval of Major League Baseball or its clubs.