Baggies manager Darren Moore, who secured a shock win at Old Trafford last April, has made the talented Reds goalkeeper his first signing of the summer on a four-year contract at The Hawthorns.
Johnstone has always been a popular figure at the Aon Training Complex following his rise through the age groups, particularly after his role in the Academy’s celebrated FA Youth Cup success of 2011, although a first-team appearance sadly never materialised for the talented 25-year-old stopper.
One of the reasons behind Sam’s senior omission was his eagerness to gain experience as part of the loan system, which led to him enjoying temporary spells at Football League clubs Oldham Athletic, Scunthorpe United, Walsall, Yeovil Town, Doncaster Rovers and, most recently, Aston Villa.