Walt Masterson was 2-2 with an ERA of 5.55 and 12 strikeouts in 24 appearances in his rookie season in 1939.

		NAME	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1		Walt Masterson W. Masterson	1939	WSH	24	2	2	.500	5	5.55	12	1	0	0	58.1	66	36	44	2	48	2	14		287	2	1.85	7.41	0.25	0.31	4.2	16.7	1.95	.287	6.79	127	5.58	132	10.18	-9.4

Games

	NAME	DATE	SEASON	TM		OPP	DEC	GS	ERA	SO	CG	IP	H	ER	R	HR	BB	HBP	GF	TBF	WP
1	Walt Masterson W. Masterson	8/24/1939	1939	WSH	@	DET		0	13.50	0	0	2.0	4	3	3	0	2	0	1	11	0
2	Walt Masterson W. Masterson	8/20/1939	1939	WSH	vs	BSA		0	5.40	0	0	1.2	1	1	1	0	2	0	0	8	0
3	Walt Masterson W. Masterson	8/18/1939	1939	WSH	vs	BSA		0	0.00	0	0	1.0	1	0	0	0	0	0	1	4	0
4	Walt Masterson W. Masterson	8/12/1939	1939	WSH	@	BSA		0	9.00	0	0	3.0	6	3	3	0	1	0	1	14	1
5	Walt Masterson W. Masterson	8/9/1939	1939	WSH	vs	NYY		0	4.50	1	0	2.0	0	1	1	0	7	0	0	12	0
6	Walt Masterson W. Masterson	8/4/1939	1939	WSH	vs	CWS		0	0.00	0	0	1.0	1	0	0	0	0	0	0	4	0
7	Walt Masterson W. Masterson	7/27/1939	1939	WSH	vs	DET	L	1	10.13	1	0	2.2	6	3	7	0	2	0	0	16	0
8	Walt Masterson W. Masterson	7/23/1939	1939	WSH	@	CLE		0		0	0	0.0	1	0	0	0	1	0	1	2	0
9	Walt Masterson W. Masterson	7/21/1939	1939	WSH	@	CLE		0	0.00	1	0	1.0	1	0	0	0	0	0	1	3	0
10	Walt Masterson W. Masterson	7/15/1939	1939	WSH	@	SLA		0		0	0	0.0	2	2	2	0	2	0	0	4	0
11	Walt Masterson W. Masterson	7/8/1939	1939	WSH	@	PHA	L	1	7.11	0	0	6.1	7	5	6	0	3	0	0	28	0
12	Walt Masterson W. Masterson	7/2/1939	1939	WSH	vs	PHA		1	2.16	1	0	8.1	8	2	3	0	9	0	0	41	0
13	Walt Masterson W. Masterson	6/26/1939	1939	WSH	vs	BSA		0	0.00	0	0	3.0	1	0	0	0	0	1	1	12	0
14	Walt Masterson W. Masterson	6/25/1939	1939	WSH	vs	DET		0	0.00	1	0	1.0	0	0	0	0	2	0	1	5	0
15	Walt Masterson W. Masterson	6/23/1939	1939	WSH	vs	DET		0	0.00	1	0	1.0	1	0	0	0	0	0	1	5	0
16	Walt Masterson W. Masterson	6/15/1939	1939	WSH	vs	CWS		0	0.00	0	0	2.1	2	0	0	0	2	0	1	10	0
17	Walt Masterson W. Masterson	6/8/1939	1939	WSH	@	CLE		0	0.00	0	0	1.0	1	0	0	0	1	0	1	5	0
18	Walt Masterson W. Masterson	6/7/1939	1939	WSH	@	CLE	W	0	0.00	0	0	1.0	0	0	0	0	1	0	0	4	0
19	Walt Masterson W. Masterson	6/4/1939	1939	WSH	@	SLA		0	54.00	0	0	1.0	6	6	6	0	2	0	1	11	0
20	Walt Masterson W. Masterson	5/28/1939	1939	WSH	@	BSA		0	7.20	1	0	5.0	6	4	6	2	0	0	1	22	0
21	Walt Masterson W. Masterson	5/24/1939	1939	WSH	vs	SLA		1	15.00	1	0	3.0	4	5	5	0	3	1	0	18	0
22	Walt Masterson W. Masterson	5/17/1939	1939	WSH	vs	DET	W	1	1.00	3	1	9.0	6	1	1	0	6	0	0	40	1
23	Walt Masterson W. Masterson	5/15/1939	1939	WSH	vs	BSA		0	0.00	1	0	1.0	0	0	0	0	0	0	1	3	0
24	Walt Masterson W. Masterson	5/8/1939	1939	WSH	@	CLE		0	0.00	0	0	1.0	1	0	0	0	2	0	1	4	0
	Total							5	5.55	12	1	58.1	66	36	44	2	48	2	14	287	2