Player stats

Walks per 9 Innings 2021

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, 2021. Data refreshed Sep 12, 2026, 7:39 AM UTC.

No. 1 / Walks per 9 Innings / 2021

Nathan Eovaldi

BOS

1.73

Season leader, lower is better

Walks per 9 Innings2021 season, lower is better
#	Player	Team	IP	BF	BB/9
1	N. EovaldiNathan Eovaldi	BOS	182.1	764	1.73
2	M. ScherzerMax Scherzer	LAD	179.1	693	1.81
3	C. BurnesCorbin Burnes	MIL	167.0	657	1.83
4	J. UríasJulio Urías	LAD	185.2	745	1.84
5	Z. GreinkeZack Greinke	HOU	171.0	697	1.89
6	Z. WheelerZack Wheeler	PHI	213.1	849	1.94
7	A. NolaAaron Nola	PHI	180.2	749	1.94
8	H. Jin RyuHyun Jin Ryu	TOR	169.0	701	1.97
9	C. FlexenChris Flexen	SEA	179.2	741	2.00
10	G. ColeGerrit Cole	NYY	181.1	726	2.03
11	T. AndersonTyler Anderson	SEA	167.0	703	2.05
12	S. ManaeaSean Manaea	OAK	179.1	754	2.06
13	J. BerríosJosé Berríos	TOR	192.0	781	2.11
14	C. IrvinCole Irvin	OAK	178.1	768	2.12
15	B. WoodruffBrandon Woodruff	MIL	179.1	708	2.16
16	A. WainwrightAdam Wainwright	STL	206.1	828	2.18
17	K. HendricksKyle Hendricks	CHC	181.0	785	2.19
18	S. AlcantaraSandy Alcantara	MIA	205.2	837	2.19
19	M. StromanMarcus Stroman	NYM	179.0	730	2.21
20	M. FriedMax Fried	ATL	165.2	667	2.23
21	W. BuehlerWalker Buehler	LAD	207.2	815	2.25
22	A. DeSclafaniAnthony DeSclafani	SF	167.2	676	2.25
23	K. GausmanKevin Gausman	SF	192.0	775	2.34
24	Y. DarvishYu Darvish	SD	166.1	681	2.38
25	R. RayRobbie Ray	TOR	193.1	773	2.42
26	L. GiolitoLucas Giolito	CWS	178.2	720	2.62
27	J. MusgroveJoe Musgrove	SD	181.1	748	2.68
28	F. MontasFrankie Montas	OAK	187.0	778	2.74
29	W. MileyWade Miley	CIN	163.0	690	2.76
30	J. LylesJordan Lyles	TEX	180.0	769	2.80
31	C. MortonCharlie Morton	ATL	185.2	756	2.81
32	P. CorbinPatrick Corbin	WSH	171.2	751	3.15
33	K. GibsonKyle Gibson	PHI	182.0	754	3.16
34	T. MahleTyler Mahle	CIN	180.0	759	3.20
35	G. MárquezGermán Márquez	COL	180.0	756	3.20
36	D. KeuchelDallas Keuchel	CWS	162.0	720	3.28
37	L. CastilloLuis Castillo	CIN	187.2	803	3.60
38	D. CeaseDylan Cease	CWS	165.2	708	3.69
39	L. McCullers Jr.Lance McCullers Jr.	HOU	162.1	684	4.21

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.