Discovering comprehensive 2023 football checklists requires targeting specific, reliable sources. Here’s where experts look:
Official Football Bodies & Clubs
National Associations & Major Clubs: FIFA, UEFA, CONMEBOL, AFC, and top-tier club websites (Real Madrid, FC Barcelona, Manchester City FC, etc.) publish verified player lists, tournament guides, and squad data. Their online resources offer authoritative checklists.
Specialized Football Data Websites
Analytics & Statistics Platforms: Dedicated football sites focus on granular player stats, positional performance metrics, transfers, and team tactics. These platforms provide essential data-driven checklists for enthusiasts and professionals.

Reputable Football News & Media Outlets
Established Sports Publications: Trusted sports media outlets (print and digital) offer season previews/reviews, top player/talent lists, and transfer window summaries. Their rigorously researched features serve as foundational checklists.
Football Gaming Databases
EA Sports FC & eFootball Platforms: Leading football simulation games compile extensive virtual player rosters with detailed attributes. Sites hosting player databases for these games (e.g., FUT or MyClub equivalents) act as unique interactive player checklists.
Verified Retailer Platforms (For Collectibles)
Authorized Merchants: For physical collector checklists (e.g., sticker collections, cards), source directly from official club stores or league/licensed partner retailers. Counterfeit items are prevalent; authenticity is paramount.
Active Football Fan Communities
Dedicated Forums & Social Media Groups: Niche forums and well-moderated groups offer crowd-sourced insights into emerging talents, team formations, and seasonal predictions, complementing official sources.
Focus: Prioritize recency (2023 season data), source credibility (official bodies/reputable analytics), and specific checklist type (players, teams, tactics, collectibles) for optimal results. Engaging deeply with community discussions can yield valuable practical insights.