Apparently, this mild injury was a group effort involving Sampson and his son, 10-month-old C.J., and Sampson's wife, Heather.
"C.J. couldn't sleep. He kept waking us up," Sampson said. "In order for us to get some sleep, Heather brought him into bed with us so we could sleep. I was concerned about rolling over on him, so I slept in a weird position. I woke up and I couldn't move."
Sampson spent quite a bit of time in the training room prior to Tuesday's game, but massages and heat pads didn't work. Minutes before first pitch, Sampson, who was scheduled to appear after starter Brandon Backe, was scratched from the outing.
"I probably could have gone out there and pitched, but I didn't want to risk altering my mechanics because of my neck and end up hurting my arm," Sampson said.
The right-hander hopes to return to the mound in the next couple of days.
"If not tomorrow, the next day, or whenever they tell me that I'm pitching," Sampson said. "Hopefully soon."
Alyson Footer is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.