John Costello had a 5-2 record with an ERA of 1.81, 38 strikeouts and 1 save in 36 appearances in his rookie season in 1988.

		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		John Costello J. Costello	1988	STL	36	5	2	.714	0	1.81	38	0	0	1	49.2	44	10	15	3	25	0	15	4	214	0	6.89	4.53	1.52	0.54	17.8	11.7	1.39	.277	2.72	52	3.53	102	7.97	-0.3

Games

	NAME	DATE	SEASON	TM		OPP	DEC	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP
1	John Costello J. Costello	10/2/1988	1988	STL	@	NYM		0	0.00	4	0	0	0	2.0	1	0	0	0	0	0	1	0	6	0
2	John Costello J. Costello	9/27/1988	1988	STL	@	PIT		0	0.00	0	0	0	0	0.1	0	0	0	0	0	0	0	0	1	0
3	John Costello J. Costello	9/24/1988	1988	STL	vs	NYM		0	0.00	0	0	0	0	1.0	2	0	4	0	2	0	1	0	8	0
4	John Costello J. Costello	9/23/1988	1988	STL	vs	NYM	W	0	0.00	0	0	0	0	1.0	0	0	0	0	0	0	1	0	3	0
5	John Costello J. Costello	9/19/1988	1988	STL	vs	PIT		0	0.00	0	0	0	0	0.2	1	0	1	0	2	0	0	0	5	0
6	John Costello J. Costello	9/17/1988	1988	STL	@	CHC	L	0	7.71	1	0	0	0	2.1	5	2	2	1	0	0	0	0	13	0
7	John Costello J. Costello	9/14/1988	1988	STL	@	PHI		0	16.20	1	0	0	0	1.2	4	3	3	1	0	0	0	0	9	0
8	John Costello J. Costello	9/11/1988	1988	STL	vs	CHC		0	0.00	1	0	0	0	1.0	0	0	0	0	0	0	0	0	3	0
9	John Costello J. Costello	9/4/1988	1988	STL	@	HOU		0	0.00	2	0	0	0	2.2	3	0	0	0	1	0	0	1	12	0
10	John Costello J. Costello	9/3/1988	1988	STL	@	HOU		0	54.00	0	0	0	0	0.1	2	2	2	0	3	0	0	1	6	0
11	John Costello J. Costello	8/29/1988	1988	STL	@	ATL		0	0.00	2	0	0	1	1.2	0	0	0	0	0	0	1	0	5	0
12	John Costello J. Costello	8/25/1988	1988	STL	@	CIN		0	0.00	2	0	0	0	2.2	2	0	0	0	2	0	0	1	12	0
13	John Costello J. Costello	8/22/1988	1988	STL	vs	ATL		0	0.00	2	0	0	0	2.0	0	0	0	0	0	0	1	0	6	0
14	John Costello J. Costello	8/19/1988	1988	STL	vs	CIN	W	0	0.00	1	0	0	0	2.2	1	0	0	0	1	0	0	0	10	0
15	John Costello J. Costello	8/16/1988	1988	STL	vs	HOU		0	0.00	0	0	0	0	0.1	1	0	0	0	1	0	0	0	3	0
16	John Costello J. Costello	8/14/1988	1988	STL	@	CHC		0	0.00	0	0	0	0	0.2	0	0	0	0	1	0	0	0	3	0
17	John Costello J. Costello	8/11/1988	1988	STL	@	PHI	L	0	2.70	4	0	0	0	3.1	5	1	1	0	1	0	1	0	16	0
18	John Costello J. Costello	8/6/1988	1988	STL	vs	MON		0	0.00	4	0	0	0	3.0	2	0	0	0	2	0	0	0	11	0
19	John Costello J. Costello	8/4/1988	1988	STL	vs	PHI		0	0.00	1	0	0	0	2.0	1	0	0	0	1	0	1	0	8	0
20	John Costello J. Costello	7/28/1988	1988	STL	@	MON		0	0.00	0	0	0	0	0.1	1	0	0	0	0	0	1	0	2	0
21	John Costello J. Costello	7/27/1988	1988	STL	vs	PIT		0	0.00	0	0	0	0	0.1	0	0	0	0	1	0	1	1	2	0
22	John Costello J. Costello	7/24/1988	1988	STL	vs	SFG		0	0.00	0	0	0	0	1.0	1	0	0	0	0	0	1	0	4	0
23	John Costello J. Costello	7/22/1988	1988	STL	vs	SFG		0	0.00	1	0	0	0	2.0	1	0	0	0	2	0	0	0	8	0
24	John Costello J. Costello	7/20/1988	1988	STL	vs	LAD	W	0	0.00	1	0	0	0	1.1	2	0	0	0	0	0	0	0	6	0
25	John Costello J. Costello	7/16/1988	1988	STL	vs	SDP	W	0	0.00	1	0	0	0	0.2	0	0	0	0	0	0	1	0	2	0
	Total							0	1.81	38	0	0	1	49.2	44	10	15	3	25	0	15	4	214	0