In 1921 , the WAFL followed the idea of the SANFL 's Magarey Medal .
In 1921 , the WAFL introduced the Sandover Medal , for the fairest and best player over a season , as voted by the field umpires .
In 1921 , the WAFL followed the idea of the SANFL 's Magarey Medal and introduced the Sandover Medal , for the fairest and best player over a season , as voted by the field umpires .