Death of a Salesman Symbolism: the Silver Trophy
The silver trophy represents Willy's lack of recent success, sense of entitlement, tarnished reputation and mediocrity. It is also symbolic of Biff's peaking in high school and "getting lost".
There is one mention of the trophy in the description of the set. It is slightly tarnished. It is silver rather than gold, suggesting that Willy was never the best. It is above his bed, rather than Biff's. Perhaps because Willy is more reminiscent of Biff's high school days than Biff is.