India, Dec. 9 -- Los Angeles Chargers quarterback Justin Herbert and singer Madison Beer have quietly become one of the more closely watched off-field pairings of the NFL season. Their relationship first drew attention early in the year, and interest has only increased as both have pushed through demanding professional schedules.

The timing is notable. Herbert is preparing for a prime-time matchup, while Beer has delivered a long-awaited update tied to her music career.

Herbert entered the week with the Chargers holding an 8-4 record, very much in the playoff mix despite injuries across the roster. Through 12 games, the quarterback has thrown for 2,842 yards, recording 21 touchdowns and 10 interceptions. The numbers have kept Los Angele...