Gonzales will be placed on the 15-day injured list due to a left forearm strain, Alex Stumpf of MLB.com reports.
Gonzales struggled mightily in his last start Wednesday against the Padres, but the team neglected to report any injury news until Monday. It's still too early to know when Gonzales could return to the starting rotation, and Stumpf notes that the team is still gathering more information on the southpaw's injury to determine a rehab plan.