Shields simulated a few innings and got in a bullpen session Friday, Andrew Guzman of the White Sox's official site reports.

EDGE Analysis

Shields had been scheduled to start Friday's exhibition game against the Brewers, but requested to throw a bullpen session instead. He said he was able to "work out a few kinks" and it was a good tuneup for his fist regular-season start scheduled Wednesday, April 5, against Detroit.