You need to take him to your Doctor for physical examination and if needed for Skiagram.
Protruding ribs with pain and tenderness, in a wrestler, needs attention, as Rib fracture
has to be ruled out for sure.
Till you visit a doctor, you may give him Acetaminophen
in a dose of 15 mg/kg/dose , repeated every 6 hrs for pain relief.
Hope my answer helps you.