Player stats

Walks per 9 Innings 2018

Walks allowed per nine innings pitched, including intentional walks.

Season

Minimum workload: one inning pitched per game. Completed seasons use the league's scheduled regular-season game count; seasons in progress use team games played. This is a general pitching minimum, not a relief-pitcher qualification rule. Data through December 31, 2018. Data refreshed Sep 12, 2026, 7:39 AM UTC.

No. 1 / Walks per 9 Innings / 2018

Miles Mikolas

STL

1.30

Season leader, lower is better

Walks per 9 Innings2018 season, lower is better
#	Player	Team	IP	BF	BB/9
1	M. MikolasMiles Mikolas	STL	200.2	808	1.30
2	C. KluberCorey Kluber	CLE	215.0	842	1.42
3	J. VerlanderJustin Verlander	HOU	214.0	833	1.56
4	M. LeakeMike Leake	SEA	185.2	784	1.65
5	M. GonzalesMarco Gonzales	SEA	166.2	686	1.73
6	Z. GreinkeZack Greinke	AZ	207.2	839	1.86
7	J. deGromJacob deGrom	NYM	217.0	835	1.91
8	M. FiersMike Fiers	OAK	172.0	714	1.94
9	K. HendricksKyle Hendricks	CHC	199.0	812	1.99
10	C. CarrascoCarlos Carrasco	CLE	192.0	784	2.02
11	M. ScherzerMax Scherzer	WSH	220.2	866	2.08
12	P. CorbinPatrick Corbin	AZ	200.0	800	2.16
13	L. SeverinoLuis Severino	NYY	191.1	780	2.16
14	J. TaillonJameson Taillon	PIT	191.0	785	2.17
15	J. JunisJakob Junis	KC	177.0	758	2.19
16	W. LeBlancWade LeBlanc	SEA	162.0	662	2.22
17	A. HeaneyAndrew Heaney	LAA	180.0	749	2.25
18	R. PorcelloRick Porcello	BOS	191.1	808	2.26
19	K. GausmanKevin Gausman	ATL	183.2	776	2.45
20	A. NolaAaron Nola	PHI	212.1	831	2.46
21	T. RoarkTanner Roark	WSH	180.1	760	2.50
22	D. KeuchelDallas Keuchel	HOU	204.2	874	2.55
23	D. PriceDavid Price	BOS	176.0	722	2.56
24	J. HappJ.A. Happ	NYY	177.2	733	2.58
25	L. CastilloLuis Castillo	CIN	169.2	708	2.60
26	G. MárquezGermán Márquez	COL	196.0	817	2.62
27	J. UreñaJosé Ureña	MIA	174.0	712	2.64
28	M. BoydMatthew Boyd	DET	170.1	709	2.69
29	Z. WheelerZack Wheeler	NYM	182.1	744	2.71
30	J. GrayJon Gray	COL	172.1	743	2.72
31	N. PivettaNick Pivetta	PHI	164.0	694	2.80
32	D. BundyDylan Bundy	BAL	171.2	750	2.83
33	J. BerríosJosé Berríos	MIN	192.1	797	2.85
34	G. ColeGerrit Cole	HOU	200.1	799	2.88
35	T. WilliamsTrevor Williams	PIT	170.2	701	2.90
36	T. BauerTrevor Bauer	CLE	175.1	717	2.93
37	J. ArrietaJake Arrieta	PHI	172.2	724	2.97
38	M. ClevingerMike Clevinger	CLE	200.0	810	3.02
39	T. AndersonTyler Anderson	COL	176.0	737	3.02
40	C. HamelsCole Hamels	CHC	190.2	806	3.07
41	K. FreelandKyle Freeland	COL	202.1	844	3.11
42	J. LesterJon Lester	CHC	181.2	761	3.17
43	B. SnellBlake Snell	TB	180.2	700	3.19
44	J. ChacínJhoulys Chacín	MIL	192.2	796	3.32
45	M. FoltynewiczMike Foltynewicz	ATL	183.0	744	3.34
46	J. ShieldsJames Shields	CWS	204.2	871	3.43
47	C. MortonCharlie Morton	HOU	167.0	695	3.45
48	J. QuintanaJose Quintana	CHC	174.1	739	3.51
49	D. HollandDerek Holland	SF	171.1	727	3.52
50	R. LópezReynaldo López	CWS	188.2	799	3.58

BB/9: Walks allowed per nine innings pitched, including intentional walks.

Understanding Walks per 9 Innings

Walks allowed per nine innings pitched, including intentional walks.

Formula: 27 × BB ÷ outs recorded

Read rates alongside playing time. A small sample can produce an extreme result, and a missing value is different from zero.

Season rankings use regular-season records. A player has one combined row across teams; the team label identifies the associated team, not a separate team stint.

Source: MLB statistics and MLBDB derived measures. Formulas describe the measure above. Data refreshed Sep 12, 2026, 7:39 AM UTC.