MLB's first extra-innings game produced a walkoff grand slam

Oakland A's set MLB record with two walk-off grand slams in first 11 games - Athletics Nation

Dodgers beat Phillies on Max Muncy's walk-off grand slam - Los Angeles Times

Goldschmidt hits walk-off grand slam in 10th inning to lift Cardinals over Blue Jays

Altuve slugs way into MLB history as Astros down Rangers 8-4 - The San Diego Union-Tribune

Angels, A's make MLB history by being first to play under 2020 rule for extra innings

Xander Bogaerts' walk-off grand slam lifts Red Sox over Blue Jays

Grand Slam by Cruz Gives Rangers 2-0 Edge Over Tigers - The New York Times

Walk-off home run - Wikipedia

Contreras hits 1st-inning slam, Cubs beat Pirates 9-0

MLB roundup: White Sox sink Tigers on walk-off grand slam

MLB roundup: Josh Donaldson's 10th-inning slam rescues Yanks

A's beat Angels on walk-off grand slam - Yahoo Sports

MLB: Mayberry hits walk-off slam in 11th for Phillies – The Mercury

MLB ROUNDUP: Yankees rebound against the Rockies as an error gives the Angels a walkoff win extras