Scott joined City from Swansea on 31 August 2012 and made 15 appearances in all competitions for the Blues in 2012/13.
His debut came for City came in 15 September 2012’s 1-1 draw with Stoke City.
It was one of three starts Sinclair made in his first season at City.
Scott began his career at Bristol Rovers where he made his debut at the age of 15, before joining Chelsea in July 2005.
He remained at Stamford Bridge until 2010 when he signed up for Swansea on a permanent basis, going on to amass 82 appearances, scoring 28 goals.
This switch to West Brom marks Scott’s seventh loan spell in his career.
The 24-year old has represented Plymouth Argyle, QPR, Charlton, Crystal Palace, Birmingham City and Wigan Athletic on loan.
Sinclair has represented England under-21s on seven occasions, scoring one goal.
You can keep up to date with Scott’s time at the The Hawthorns in our weekly Loan Watch feature.