Mookie Betts: highest percent of home runs from three home run games: 11.6%, more than twice #2 Johnny Mize.

Babe Ruth is the only player to hit three home runs in a World Series game twice, both against the St. Louis Cardinals:

Wednesday, October 6, 1926 game four; Cardinals won WS 4-3.

Tuesday, October 9, 1928 game four; Yanks swept.

So, 6 of Ruth's 15 WS HR came in those two games: 40%.

But in the regular season Ruth had the same number of three home run games:

Rk	Date	Tm	Opp	Rslt	PA	AB	R	H	2B	3B	HR	RBI	BB	IBB	SO	HBP	SH	SF	ROE	GDP	SB	CS	WPA	RE24	aLI	BOP	Pos Summary	DFS(DK)	DFS(FD)
1	1930-05-21 (1)	NYY	PHA	L 7-15	4	4	3	3	0	0	3	6	0	0	0	0	0		0		0	0	0.296	4.867	.728	3	LF
2	1935-05-25	BSN	PIT	L 7-11	4	4	3	4	0	0	3	6	0	0	0	0	0		0	0	0	0	0.504	5.147	1.173	3	RF

The three in 1935 were the last of his career, numbers 712, 713, 714. So these six home runs represented only 0.84% of his regular season total.

39 players have hit at least three home runs in a game at least three times:

HRc	%	Player	#		PA	AB	R	H	2B	3B	HR	RBI	BB	SO
609	2.96%	Sammy Sosa	6	Ind. Games	25	24	18	18	0	0	18	30	1	2
359	5.01%	Johnny Mize	6	Ind. Games	28	26	20	18	0	0	18	30	2	1
155	11.61%	Mookie Betts	6	Ind. Games	30	27	21	22	1	0	18	29	2	0
696	2.16%	Alex Rodriguez	5	Ind. Games	24	23	17	18	0	0	15	30	1	3
583	2.57%	Mark McGwire	5	Ind. Games	25	21	18	16	0	0	15	26	4	3
442	3.39%	Dave Kingman	5	Ind. Games	29	27	16	17	0	0	15	33	2	4
473	3.38%	Carlos Delgado	5	Ind. Games	23	22	17	16	0	0	16	21	1	3
396	3.79%	Joe Carter	5	Ind. Games	23	21	15	18	0	0	15	22	1	2
475	2.53%	Willie Stargell	4	Ind. Games	19	19	13	15	2	0	12	22	0	4
386	3.11%	Aramis Ramirez	4	Ind. Games	18	17	12	13	1	0	12	21	1	3
662	1.81%	Albert Pujols	4	Ind. Games	19	16	15	14	1	0	12	19	3	0
256	4.69%	Larry Parrish	4	Ind. Games	20	20	15	15	1	0	12	23	0	2
369	3.25%	Ralph Kiner	4	Ind. Games	21	17	14	12	0	0	12	23	4	0
493	2.64%	Lou Gehrig	4	Ind. Games	23	20	14	15	0	0	13	23	2	1
304	3.95%	Steve Finley	4	Ind. Games	21	19	13	13	0	0	12	16	2	2
762	1.57%	Barry Bonds	4	Ind. Games	21	19	13	15	2	0	12	15	2	2
512	2.34%	Ernie Banks	4	Ind. Games	19	18	14	14	1	0	12	18	1	0
521	1.73%	Ted Williams	3	Ind. Games	15	14	10	10	0	0	9	17	1	1
383	2.35%	Larry Walker	3	Ind. Games	16	14	10	12	1	0	9	18	2	0
295	3.05%	Joey Votto	3	Ind. Games	15	13	11	10	1	0	9	14	2	0
409	2.20%	Mark Teixeira	3	Ind. Games	16	15	9	10	0	0	9	16	0	1
412	2.18%	Alfonso Soriano	3	Ind. Games	16	15	10	12	1	0	9	13	1	0
548	1.82%	Mike Schmidt	3	Ind. Games	14	14	10	11	0	0	10	19	0	0
339	2.65%	Boog Powell	3	Ind. Games	14	13	9	10	0	0	9	10	1	1
235	3.83%	Ben Oglivie	3	Ind. Games	13	10	9	9	0	0	9	14	3	0
504	1.79%	Eddie Murray	3	Ind. Games	17	16	9	11	0	0	9	19	1	0
243	3.70%	Andrew McCutchen	3	Ind. Games	15	13	11	10	0	0	9	14	2	0
521	1.73%	Willie McCovey	3	Ind. Games	14	12	10	9	0	0	9	13	1	1
660	1.52%	Willie Mays	3	Ind. Games	15	15	10	11	0	0	10	17	0	1
248	3.63%	Goose Goslin	3	Ind. Games	16	15	9	10	0	0	9	16	1	2
434	2.07%	Juan Gonzalez	3	Ind. Games	13	13	9	10	0	0	9	14	0	1
319	2.82%	Cecil Fielder	3	Ind. Games	14	12	9	10	0	0	9	15	2	2
424	2.12%	Edwin Encarnacion	3	Ind. Games	14	14	10	9	0	0	9	18	0	0
361	2.49%	Joe DiMaggio	3	Ind. Games	15	14	10	11	1	0	9	15	1	0
374	2.67%	Rocky Colavito	3	Ind. Games	15	14	11	10	0	0	10	17	1	1
389	2.31%	Johnny Bench	3	Ind. Games	14	13	9	10	0	0	9	18	1	1
381	2.36%	Albert Belle	3	Ind. Games	15	11	9	10	0	0	9	14	3	0
384	2.34%	Harold Baines	3	Ind. Games	14	12	10	10	1	0	9	17	2	0
449	2.00%	Jeff Bagwell	3	Ind. Games	16	16	9	10	0	0	9	18	0	3

Among the 39 above, these include a four home run game: Gehrig, Colavito, Mays, Schmidt, Delgado.

Link with 115 players with at least two games with at least three home runs.

Three players have six games with at least three home runs. Mookie Betts stands out because he has done it in only 155 career home runs. His 18 home runs in those six games represent 11.6% of his career total, more than twice that of Johnny Mize, number two.

Rk	Date	Tm	Opp	Rslt	PA	AB	R	H	2B	3B	HR	RBI	BB	IBB	SO	HBP	SH	SF	ROE	GDP	SB	CS	WPA	RE24	aLI	BOP	Pos Summary	DFS(DK)	DFS(FD)
1	2016-05-31	BOS	BAL	W 6-2	5	5	3	3	0	0	3	5	0	0	0	0	0	0	0	0	0	0	0.327	4.310	.540	1	RF	46.00	63.10
2	2016-08-14	BOS	ARI	W 16-2	6	6	4	4	0	0	3	8	0	0	0	0	0	0	0	0	0	0	0.238	5.781	.318	3	RF	57.00	79.80
3	2018-04-17	BOS	LAA	W 10-1	5	3	3	3	0	0	3	3	2	0	0	0	0	0	0	0	0	0	0.161	3.923	.498	1	RF	46.00	62.10
4	2018-05-02	BOS	KCR	W 5-4	4	4	3	4	0	0	3	3	0	0	0	0	0	0	0	0	0	0	0.386	3.391	.845	1	RF	45.00	59.10
5	2019-07-26	BOS	NYY	W 10-5	5	5	4	4	1	0	3	5	0	0	0	0	0	0	0	0	0	0	0.197	4.673	.354	1	RF	53.00	72.30
6	2020-08-13	LAD	SDP	W 11-2	5	4	4	4	0	0	3	5	0	0	0	1	0	0	0	0	0	0	0.219	5.155	.424	1	RF	53.00	72.30

Betts hit three homers in Fenway Park on these dates:

Sunday, August 14, 2016

Wednesday, May 2, 2018

Friday, July 26, 2019

Betts most home runs in a season: 32 in 2018.

Johnny Mize six three home run games with Cards, Giants, Yanks:

Rk	Date	Tm	Opp	Rslt	PA	AB	R	H	2B	3B	HR	RBI	BB	IBB	SO	HBP	SH	SF	ROE	GDP	SB	CS	WPA	RE24	aLI	BOP	Pos Summary	DFS(DK)	DFS(FD)
1	1938-07-13	STL	BSN	L 5-10	4	4	3	3	0	0	3	5	0	0	0	0	0		0	1	0	0	0.046	3.547	.603	5	1B
2	1938-07-20 (2)	STL	NYG	W 7-1	4	4	3	3	0	0	3	5	0	0	0	0	0		0	0	0	0	0.293	4.424	.550	5	1B
3	1940-05-13	STL	CIN	T 8-8	7	5	4	3	0	0	3	4	2	1	0	0	0		0	0	0	0	0.665	3.926	1.517	5	1B
4	1940-09-08 (1)	STL	PIT	L 14-16	5	5	4	3	0	0	3	6	0	0	0	0	0		1	0	0	0	0.487	5.356	1.124	4	1B
5	1947-04-24	NYG	BSN	L 5-14	4	4	3	3	0	0	3	4	0	0	0	0	0		0	0	0	0	0.058	3.262	.658	4	1B
6	1950-09-15	NYY	DET	L 7-9	4	4	3	3	0	0	3	6	0	0	1	0	0		0	0	0	0	0.536	5.068	1.503	5	1B

Mize most home runs in a season: 51 in 1947.

Sammy Sosa six three home run games:

Rk	Date	Tm	Opp	Rslt	PA	AB	R	H	2B	3B	HR	RBI	BB	IBB	SO	HBP	SH	SF	ROE	GDP	SB	CS	WPA	RE24	aLI	BOP	Pos Summary	DFS(DK)	DFS(FD)
1	1996-06-05	CHC	PHI	W 9-6	4	4	3	3	0	0	3	5	0	0	0	0	0	0	0	0	0	0	0.338	3.942	1.078	4	RF
2	1998-06-15	CHC	MIL	W 6-5	4	4	3	3	0	0	3	3	0	0	1	0	0	0	0	0	0	0	0.253	2.830	.418	3	RF
3	2001-08-09	CHC	COL	L 5-14	4	4	3	3	0	0	3	3	0	0	0	0	0	0	0	0	0	0	0.075	2.799	.478	3	RF
4	2001-08-22	CHC	MIL	W 16-3	5	4	3	3	0	0	3	6	1	0	0	0	0	0	0	0	0	0	0.180	4.320	.300	3	RF
5	2001-09-23	CHC	HOU	L 6-7	4	4	3	3	0	0	3	4	0	0	0	0	0	0	0	0	0	0	0.369	3.465	1.445	3	RF
6	2002-08-10	CHC	COL	W 15-1	4	4	3	3	0	0	3	9	0	0	1	0	0	0	0	0	0	0	0.252	7.495	.695	3	RF

Sosa most home runs in a season: 66 in 1998. In 2001 Sosa hit 64, including three 3 home run games.

Including two home run games, percent of career home runs in multi home run games:

	HRc	3HR	2HR	% multi
Betts	155	6	12	27.10%
Mize	359	6	24	18.38%
Sosa	609	6	63	23.65%

16 four home run games since 1932:

Rk	Player	Date	Tm	Opp	Rslt	PA	AB	R	H	2B	3B	HR	RBI	BB	IBB	SO	HBP
1	J.D. Martinez	2017-09-04	ARI	LAD	W 13-0	5	5	4	4	0	0	4	6	0	0	1	0
2	Scooter Gennett	2017-06-06	CIN	STL	W 13-1	5	5	4	5	0	0	4	10	0	0	0	0
3	Josh Hamilton	2012-05-08	TEX	BAL	W 10-3	5	5	4	5	1	0	4	8	0	0	0	0
4	Carlos Delgado	2003-09-25	TOR	TBD	W 10-8	4	4	4	4	0	0	4	6	0	0	0	0
5	Shawn Green	2002-05-23	LAD	MIL	W 16-3	6	6	6	6	1	0	4	7	0	0	0	0
6	Mike Cameron	2002-05-02	SEA	CHW	W 15-4	6	5	4	4	0	0	4	4	0	0	0	1
7	Mark Whiten	1993-09-07 (2)	STL	CIN	W 15-2	5	5	4	4	0	0	4	12	0	0	0	0
8	Bob Horner	1986-07-06	ATL	MON	L 8-11	5	5	4	4	0	0	4	6	0	0	0	0
9	Mike Schmidt	1976-04-17	PHI	CHC	W 18-16	6	6	4	5	0	0	4	8	0	0	0	0
10	Willie Mays	1961-04-30	SFG	MLN	W 14-4	5	5	4	4	0	0	4	8	0	0	0	0
11	Rocky Colavito	1959-06-10	CLE	BAL	W 11-8	5	4	5	4	0	0	4	6	1	0	0	0
12	Joe Adcock	1954-07-31	MLN	BRO	W 15-7	5	5	5	5	1	0	4	7	0	0	0	0
13	Gil Hodges	1950-08-31	BRO	BSN	W 19-3	6	6	5	5	0	0	4	9	0	0	0	0
14	Pat Seerey	1948-07-18 (1)	CHW	PHA	W 12-11	7	6	4	4	0	0	4	7	1	0	1	0
15	Chuck Klein	1936-07-10	PHI	PIT	W 9-6	5	5	4	4	0	0	4	6	0	0	0	0
16	Lou Gehrig	1932-06-03	NYY	PHA	W 20-13	6	6	4	4	0	0	4	6	0	0	0	0

Mickey Mantle:

	HRc	3HR	2HR	% multi
Mantle	536	1	45	17.35%