Gonzales was removed from Thursday's contest against the Cubs due to left knee discomfort.
Gonzales had a limp running out of the box in the second inning, and it is now understood to have been due to residual pain in his left knee from a ball he fouled off his leg in Wednesday's loss to Chicago. He is considered day-to-day for the time being, with Tyler Callihan entering the contest for his Pirates debut in place of Gonzales.