Dudley-born Grosvenor did a tour of the West Midland clubs before arriving at City in 1933. Starting at Dudley Works, he went on to play as an amateur with Birmingham before having trials with West Brom and eventually ending up at Evesham Town.

He was given a chance at Filbert Street initially as back-up at left-half but eventually made that position his own up until wartime football. His time at City brought mixed fortunes but he did leave with a Second Division championship medal. He made 168 league appearances for the club but played just six times following the start of World War 2 before bringing his playing days to a close.

Percy's brother, Tom, was an England international and played for clubs such as Birmingham, Sheffield Wednesday and Bolton Wanderers. Indeed, football ran in the Grosvenor family blood, with younger brother Clifford joining Leicester's reserve squad while Percy was still at the club. His dad Syd was a former Wolverhampton Wanderers full-back.