"It locked up," Pollock said. "It started off where I couldn't really turn left with it. I just figured it was going to kind of loosen up, but then the whole thing just locked up."
Pollock experienced a similar issue on the right side of his neck in Denver earlier this year, and he did not have to miss any time.
"The neck is one of those things where hopefully you go to bed and wake up and it feels better," Pollock said. "But right now it's pretty locked up."
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.