A product of the Manchester United Academy, Sam has spent time on loan with Oldham Athletic, Scunthorpe United, Walsall, Yeovil Town, Doncaster Rovers and his home town club Preston North End
He was an England youth international, winning caps at under 16/17/19/20 levels. Sam comes from real goalkeeping stock. He is the son of Glenn Johnstone, who himself was a goalkeeper for Preston North End in the early nineties. His brother Max is also a professional,
Sam really came to the fore during two loan spells at Aston Villa, staring in 2017. He appeared in the 2018 Championship Play-Off Final before joining West Bromwich Albion.
During his second season at The Hawthorns, his excellent form helped ‘The Baggies’ to automatic promotion which continued into the 20/21 campaign.
The goalkeeper’s performance levels have been well documented with many calling for an international call with England.
In the summer of 2022 Sam joined Crystal Palace.
Still yet to reach his peak years, Sam looks set to be a Premier League fixture for a long time to come.