The San Francisco 49ers are facing an ugly truth ... One of the top players on the list is All-Pro left tackle Trent Williams. The future Hall-of-Famer is 36 years old and only has a few good ...

The San Francisco 49ers have one of the best left tackles in team history in Trent Williams. There's just one problem. At 36 years old, the future Hall-of-Famer is in the twilight of his career.