Most valuable World Series grand slams

Here are the 18 grand slams in World Series history, ranked by Win Probability Added (WPA):

Date	Gm#	Batter	Tm	Opp	Pitcher	Score	Inn	Out	Pit(cnt)Sequence	WPA ▾	RE24	LI
2005-10-23	2	Paul Konerko	CHW	HOU	Chad Qualls	down 4-2	b7	2	1 (0-0)	0.58	3.31	5.22
1964-10-11	4	Ken Boyer	STL	@NYY	Al Downing	down 3-0	t6	1		0.41	2.72	3.48
1962-10-08	4	Chuck Hiller	SFG	@NYY	Marshall Bridges	tied 2-2	t7	2		0.40	3.34	4.85
1988-10-15	1	Jose Canseco	OAK	@LAD	Tim Belcher	down 2-0	t2	2	2 (1-0)	0.38	3.37	3.28
1998-10-17	1	Tino Martinez	NYY	SDP	Mark Langston	tied 5-5	b7	2	6 (3-2)	0.34	3.31	4.54
1951-10-09	5	Gil McDougald	NYY	@NYG	Larry Jansen	tied 1-1	t3	2		0.32	3.33	3.22
1992-10-22	5	Lonnie Smith	ATL	@TOR	Jack Morris	ahead 2-3	t5	2	6 (1-2)	0.27	3.33	2.99
1953-10-04	5	Mickey Mantle	NYY	@BRO	Russ Meyer	ahead 1-2	t3	2		0.26	3.31	2.72
1987-10-24	6	Kent Hrbek	MIN	STL	Ken Dayley	ahead 5-6	b6	2	1 (0-0)	0.22	3.30	2.64
1956-10-05	2	Yogi Berra	NYY	@BRO	Don Newcombe	ahead 0-2	t2	2		0.20	3.32	2.18
1920-10-10	5	Elmer Smith	CLE	BRO	Burleigh Grimes	tied 0-0	b1	0		0.15	2.15	1.88
1960-10-08	3	Bobby Richardson	NYY	PIT	Clem Labine	ahead 0-2	b1	1		0.13	2.72	1.71
1936-10-02	2	Tony Lazzeri	NYY	@NYG	Dick Coffman	ahead 1-5	t3	1		0.08	2.68	1.03
1987-10-17	1	Dan Gladden	MIN	STL	Bob Forsch	ahead 1-3	b4	0	4 (1-2)	0.08	2.15	1.12
1970-10-13	3	Dave McNally	BAL	CIN	Wayne Granger	ahead 1-4	b6	2		0.07	3.35	.86
1964-10-14	6	Joe Pepitone	NYY	@STL	Gordie Richardson	ahead 1-4	t8	2		0.06	3.34	.77
1968-10-09	6	Jim Northrup	DET	@STL	Larry Jaster	ahead 0-4	t3	0		0.04	2.23	.61
1956-10-10	7	Bill Skowron	NYY	@BRO	Roger Craig	ahead 0-5	t7	0		0.01	2.16	.07

Provided by Baseball-Reference.com: View Original Table
Generated 11/9/2011.

Ken Boyer, the subject of yesterday's Hall of Fame poll, had the most valuable slam for many years until Paul Konerko's uber-valuable shot in 2005.