October 5, 2021: Red Sox win AL Wild Card Game over rival Yankees – Society for American Baseball Research
Yankees eliminated from playoff contention with 7-1 loss to Diamondbacks
The New York Yankees Beat Twins, Prove They're Built for MLB Playoffs - The Ringer
Red Sox inflict record playoff defeat on shellshocked Yankees, MLB
Red Sox beat Yankees in Wild Card Game off Kyle Schwarber and Xander Bogaerts homers
AL contenders check-in: Orioles and Rays clinch, Wild Card and West stay close - Camden Chat
MLB Playoffs: Seeding Format and Wild Card Structure Explained - Ticketmaster Blog
AL wild card: Yankees, Red Sox clinch wild-card spots on final day; Blue Jays, Mariners eliminated
Red Sox begin MLB playoffs by eliminating Yankees in AL wild-card game
Yankees eliminated from playoff contention with 7-1 loss to Diamondbacks