By Daniel Chavkin The Baltimore Ravens and San Francisco 49ers are playing in arguably the most anticipated game of the season on Monday night, as both teams enter Week 16 as the top seeds in their conference. However, as Fox was previewing the matchup during the Philadelphia Eagles-New York Giants game, the network made an egregious error. Fox showed a graphic comparing the stats of Ravens quarterback Lamar Jackson and 49ers quarterback Brock Purdy, two of the favorites in the MVP race. However, the network got Jackson’s passer rating wrong, showing a pedestrian 69.5 rating instead of his act…