It is a pure speculation and only those who are members of admission committee will know. They are bound not to discuss this in public. Sports can project a well-rounded applicant profile along with arts ( music, dance etc). Stats (GPA, MCAT in regular route MD) are used as first screening criteria in medical, school ( MD part in bsmd is soley handled by medical school) admission. Apply widely and hope that some one will like you and invite you for an interview.