Yasuaki Yamasaki

Yasuaki Yamasaki
Born: October 2, 1992
Primary Position: Pitcher
Bats: Right
Throws: Right
Height: 5'10"
Weight: 183
Career: 2015-2025

Yasuaki Yamasaki compiled a career record of 19 wins and 32 losses, with 212 saves, and a 2.72 ERA in his 514-game pitching career with the Yokohama DeNA BayStars and Yokohama Bay Stars. He began playing during the 2015 season and last took the field during the 2025 campaign.

Yokohama DeNA BayStars

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Pitching:

Year	Level	Lg	Team	W	L	W%	ERA	G	GS	GF	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF
2015	Foreign Major	JPCL	Yokohama DeNA BayStars	2	4	.333	1.92	58	0	49	37	56.3	38	13	12	2	11	0	66	1	1	4	215
2016	Foreign Major	JPCL	Yokohama DeNA BayStars	2	5	.286	3.59	59			33	57.7	57	27	23	7	23	0	61	0	0	2	252
2017	Foreign Major	JPCL	Yokohama DeNA BayStars	4	2	.667	1.64	68	0	47	26	65.7	52	16	12	3	13	0	84	1	0	1	260
2018	Foreign Major	JPCL	Yokohama DeNA BayStars	2	4	.333	2.72	57			37	56.3	40	18	17	5	18	3	63	1	0	1	226
2019	Foreign Major	JPCL	Yokohama DeNA BayStars	3	2	.600	1.95	61			30	60.0	44	18	13	6	19	2	54	0	0	0	243
2020	Foreign Major	JPCL	Yokohama Bay Stars	0	3	.000	5.68	40			6	38.0	52	26	24	4	14	2	31	0	0	1	176
2021	Foreign Major	JPCL	Yokohama Bay Stars	3	2	.600	3.27	60			1	55.0	58	21	20	2	14	1	39	3	0	0	229
2022	Foreign Major	JPCL	Yokohama Bay Stars	0	2	.000	1.33	56			37	54.3	29	9	8	4	9	1	42	0	0	1	197
2023	Foreign Major	JPCL	Yokohama Bay Stars	3	7	.300	4.37	49			20	45.3	48	22	22	7	8	0	54	1	0	1	189
2024	Foreign Major	JPCL	Yokohama Bay Stars	3	5	.375	3.35	38			4	37.7	35	18	14	4	11	0	29	3	1	1	163
2025	Foreign Major	JPCL	Yokohama Bay Stars	0	3	.000	4.20	17			1	15.0	14	7	7	4	7	2	12	0	0	0	65
Totals				19	32	.373	2.72	514	0	96	212	496.0	419	173	150	41	139	11	481	9	2	11	2026

Fielding:

Year	Level	Lg	Team	Pos	GP	PO	A	E	DP	Fld%	RF/G
2015	Foreign Major	JPCL	Yokohama DeNA BayStars	P	58	3	6	0	1	1.000	.155
2016	Foreign Major	JPCL	Yokohama DeNA BayStars	P	59	1	15	0	0	1.000	.271
2017	Foreign Major	JPCL	Yokohama DeNA BayStars	P	68	5	8	0	0	1.000	.191
2018	Foreign Major	JPCL	Yokohama DeNA BayStars	P	57	5	7	1	1	.923	.211
2019	Foreign Major	JPCL	Yokohama DeNA BayStars	P	61	4	7	1	1	.917	.180
2020	Foreign Major	JPCL	Yokohama Bay Stars	P	40	5	4	1	0	.900	.225
2021	Foreign Major	JPCL	Yokohama Bay Stars	P	60	3	6	1	1	.900	.150
2022	Foreign Major	JPCL	Yokohama Bay Stars	P	56	6	11	0	1	1.000	.304
2023	Foreign Major	JPCL	Yokohama Bay Stars	P	49	1	5	0	0	1.000	.122
2024	Foreign Major	JPCL	Yokohama Bay Stars	P	38	4	3	1	0	.875	.184
2025	Foreign Major	JPCL	Yokohama Bay Stars	P	17	1	2	0	0	1.000	.176
Totals					418	26	54	4	4	.952	.191

Minor League Service:

Year	Level	League	Team	First Appearance	Final Appearance
2015	Foreign Major	Japan Central League	Yokohama DeNA BayStars	March 28, 2015	October 3, 2015
2016	Foreign Major	Japan Central League	Yokohama DeNA BayStars
2017	Foreign Major	Japan Central League	Yokohama DeNA BayStars	April 1, 2017	October 1, 2017
2018	Foreign Major	Japan Central League	Yokohama DeNA BayStars
2019	Foreign Major	Japan Central League	Yokohama DeNA BayStars
2020	Foreign Major	Japan Central League	Yokohama Bay Stars
2021	Foreign Major	Japan Central	Yokohama Bay Stars
2022	Foreign Major	Japan Central League	Yokohama Bay Stars
2023	Foreign Major	Japan Central League	Yokohama Bay Stars
2024	Foreign Major	Japan Central League	Yokohama Bay Stars
2025	Foreign Major	Japan Central League	Yokohama Bay Stars

Persons data from the Chadwick Baseball Bureau are Copyright Chadwick Baseball Bureau, and are made available under the Open Data Commons Attribution License.