Getty The Los Angeles Rams were the only team to receive an 'A' grade from ESPN. When ESPN handed out its NFL offseason grades, only one team earned a coveted “A”: the Los Angeles Rams. It might surprise some, considering the Rams are navigating the back end of their Super Bowl window with an aging quarterback and questions about long-term sustainability. Yet in the shadows, general manager Les Snead and head coach Sean McVay orchestrated one of the most balanced offseasons in the league, and