根據他妻子的描述：他應該是勞累性猝死。詳見引述.....

Mosley’s wife, Dr. Clare Bailey, paid tribute to her “wonderful, funny, kind and brilliant” husband after his body was found, saying that he “did an incredible climb, took the wrong route and collapsed where he couldn’t be easily seen by the extensive search team.”

Exertional collaped 造成的死亡在美國每年都有不少例，特別在炎熱的天氣下運動。