Walsall have announced that apprentice Anton Reid has died.
The 16-year-old first-year youth team player collapsed during a training session at the University of Aston but no details of a cause of death have yet been made public.
A Walsall statement read: "Players and staff have been left heartbroken by this terrible tragedy."
As a mark of respect Tuesday night's Pontin's Holidays League fixture against Wolverhampton Wanderers has been postponed.
The flags at the League One club's Banks's Stadium are also flying at half-mast.
Walsall's statement added: "Our thoughts and prayers are with Anton's parents, family and friends at this very sad time."
Sad news, R.I.P Anton
My thoughts go out to the family