FIU Linebacker Luke died at 22 

School announced luke's death on Thursday 

Luke know was brother of Buffalo Bills Dawson Knox

Luke Knox played special teams at Ole Miss

Luke also had 11 tackles during four seasons there

He appeared as linebacker during this season

Thursday's practice was also cancelled due to knox's death

Luke died on wednesday evening , school said

McDermott said franchise will support knox's family 

Reason of his death is still being investigated