Nabozny appeared to slip, either on the tarp or the outfield grass. She was assisted off the field by Tigers trainers Matt Rankin and Chris McDonald. Nabozny did not appear able to put any weight on the leg.
Nabozny has been in the role with the Tigers since 1999, when she became the first female head groundskeeper in Major League history.
The National Weather Service predicted wind gusts of up to 70 mph accompanying the storm.