Lorenzen missed 25 games with a left oblique injury. He was sidelined prior to the All-Star Break after he aggravated his oblique while batting a sickness. The Royals made the decision to allow the injury discomfort to subside in recent weeks.

Perez, 34, landed on the 15-day IL on April 19 with left elbow inflammation and moved to the 60-day IL two days later. He made one rehab start each with Triple-A Charlotte and Double-A Birmingham.

Jack Flaherty opened with four scoreless innings before surrendering five runs on six hits in the 5th inning of a 9-6 loss.

Rookie Colson Montgomery homered and drove in four runs for the White Sox on Sunday. He has seven homers and 26 RBIs in 11 games since the All-Star break. The homers are tied for the most in the majors in that span, and the RBIs are No. 1.