NEW : ` Green Bay Packers Michael Philbin says . Michael Philbin , Tuesday , had been missing since Tuesday . No cause of death is known ; an autopsy is set for early Sunday .
NEW : `` We love Michael so much and will miss him dearly , '' Joe Philbin says . Michael Philbin , 21 , had been missing since early Sunday . No cause of death is known ; an autopsy is set for Tuesday .