Welcome to HCM.
Pain is not due to playing because he plays regularly everyday.
He has to go for complete investigations to rule out pain as well as fertility
CBC,URINE and usg abdomen will guide for renal stone,gall bladder stone
and other abnormality in abd. Semen analysis
If he wants child than his wife's investigations are also necessary.
Better go to hospital for checkup and further diagnosis and management.