Allen did not play in Thursday's 27-24 preseason victory over the 49ers.
This shouldn't come as much of a surprise considering neither the Chargers nor 49ers opted to play any of their regular starters. Allen did miss time throughout the preseason with a minor ankle injury, but it never seemed to be a significant issue. As a result, the 27-year-old should be set for a Week 1 matchup against the Colts.