About.com - Information on players, including career highlights and statistics.
CBS Sportsline - Player Profiles - Offers statistics and basic information on every NFL player. Listings may be searched or browsed by last name, college alumni, position, or team.
NFL.com - Players - Profiles from the official site of the NFL. Provides comprehensive information including career highlights, season splits, game logs, and multimedia on each player. Listings may be browsed by name, position, or team.
Players Inc. - News and profiles on individual players. Also regular journals by a few players.