Just for fun I decided to list all the walk-off home runs that have ended playoff series or one game playoffs (there being only one instance of the latter) and tell you the career WAR of the guy who hit it, according to Baseball Reference.
It’s a fascinating list. Name, series, career WAR / WAR in the season he hit the homer.
Asterisk indicates that was, according to BB-Ref, the player’s best season:
Bobby Thompson, Giants, 1951 NLCS (best of 3) - 33.1 / 5.1*
Bill Mazeroski, Pirates, 1960 World Series - 36.2 / 2.5
Chris Chambliss, Yankees, 1976 ALCS - 27.4 / 4.1*
Joe Carter, Blue Jays, 1993 World Series - 19.3 / 2.0
Todd Pratt, Mets, 1999 NLDS - 4.3 / 0.7
Aaron Boone, Yankees, 2003 ALCS - 13.5 / 2.7
David Ortiz, Red Sox, 2004 ALDS - 55.4 / 4.2
Chris Burke, Astros, 2005 NLDS - -1.2 / 0.4
Magglio Ordonez, Tigers, 2006 ALCS - 38.5 / 1.6
Travis Ishakawa, Giants, 2014 NLCS - 1.2 / 0.3
Edwin Encarnacion, Blue Jays, 2016 ALWC - 27.5 / 3.7
It’s interesting how many of the players are scrubs and how few are all-time greats; only Bill Mazeroski is in the Hall of Fame and he maybe wasn’t a great choice. Big Papi probably will be eventually but you never know. Todd Pratt was actually a damn good player, but never got a chance to play regularly because he was always stuck behind someone.
Ishikawa won the NLCS two years ago and I had totally forgotten he existed. He didn’t even play in an MLB game this year, and has careened through a few other organizations since then and is back in the Giants system now.