Ryan Zeferjahn

#56 Active

RP ● Chicago Cubs ● 6'5" · 209 lbs ● Bats: R · Throws: R ● Kansas

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Season SV

Season ERA

3.66

Season WHIP

0.58

Season K

Season HLD

Next Matchup @ NYM Fri 7:10 PM ET · SP: J. deGrom

DFS Last 5

Game Log

2026 Regular Season

DATE	OPPONENT	DEC	IP	H	R	ER	HR	BB	SO	ERA	WHIP	PC	RESULT
Sep 24	vs. Miami Marlins	SV	1.0	0	0	0	0	0	0	4.03	1.30	9	W 1-2
Sep 22	vs. Miami Marlins		0.2	1	0	0	0	1	1	4.09	1.32	13	L 8-2
Sep 19	@ Cincinnati Reds	HLD	1.0	1	0	0	0	0	2	4.13	1.30	24	W 5-2
Sep 16	vs. Atlanta Braves		1.0	1	0	0	0	0	1	4.20	1.31	20	W 4-8
Sep 14	vs. Atlanta Braves		1.0	2	0	0	0	1	1	4.26	1.31	24	W 3-7
Sep 12	vs. Pittsburgh Pirates	SV	0.1	0	0	0	0	0	1	4.33	1.28	6	W 3-4
Sep 7	@ Milwaukee Brewers	BS	0.1	1	1	1	0	1	1	4.35	1.29	14	L 3-4
Sep 5	@ Miami Marlins	SV	1.2	0	0	0	0	1	1	4.23	1.26	19	W 6-5
Sep 3	vs. Milwaukee Brewers	HLD	1.0	0	0	0	0	0	1	4.35	1.28	10	W 1-2
Sep 1	vs. Milwaukee Brewers		0.2	2	2	2	0	0	1	4.42	1.31	17	L 9-4
Aug 29	vs. Cincinnati Reds		1.1	0	0	0	0	0	2	4.17	1.29	19	W 5-17
Aug 26	@ Arizona Diamondbacks		1.0	2	1	1	0	0	0	4.26	1.32	7	L 0-2
Aug 24	@ Arizona Diamondbacks		1.0	0	0	0	0	0	0	4.18	1.30	10	W 7-0
Aug 21	@ Seattle Mariners	L	0.2	1	1	0	0	1	0	4.25	1.33	7	L 5-6
Aug 17	vs. Chicago White Sox	BS	1.0	2	2	2	1	1	1	4.31	1.31	24	W 5-7
Aug 14	vs. St. Louis Cardinals	HLD	1.0	1	0	0	0	1	2	4.05	1.28	27	W 0-3
Aug 11	@ Washington Nationals		0.2	3	2	2	0	1	0	4.13	1.26	23	W 8-6
Aug 9	@ Kansas City Royals		1.0	1	0	0	0	0	2	3.83	1.20	24	W 10-2
Aug 5	vs. Los Angeles Dodgers	HLD	0.2	1	1	1	1	0	2	3.91	1.20	14	W 6-7
Aug 4	vs. Los Angeles Dodgers	HLD	1.0	0	0	0	0	0	0	3.78	1.20	9	W 1-5
Aug 2	vs. Milwaukee Brewers	SV	1.2	2	0	0	0	0	4	3.86	1.22	30	W 0-3
Jul 27	vs. Houston Astros		0.1	2	1	1	0	0	0	3.99	1.23	13	L 6-4
Jul 26	@ San Francisco Giants		0.2	1	0	0	0	0	2	3.83	1.19	9	W 4-3
Jul 24	@ San Francisco Giants		0.1	0	0	0	0	0	0	3.88	1.19	7	L 6-7
Jul 19	vs. Detroit Tigers	SV	1.0	1	1	1	1	0	0	3.91	1.20	15	W 2-3
Jul 17	vs. Detroit Tigers	HLD	1.0	0	0	0	0	0	2	3.80	1.20	12	L 2-1
Jul 12	@ Minnesota Twins		1.1	1	1	1	1	0	2	3.89	1.23	27	L 2-4
Jul 9	@ Texas Rangers		1.0	0	0	0	0	0	1	3.80	1.24	17	L 6-7
Jul 8	@ Texas Rangers		1.0	1	0	0	0	0	2	3.89	1.27	17	W 13-1
Jul 4	vs. Boston Red Sox		1.1	0	0	0	0	1	2	3.98	1.28	24	L 8-1
Jun 30	@ Seattle Mariners		1.0	1	0	0	0	0	1	4.12	1.30	12	L 3-8
Jun 28	vs. Las Vegas Athletics	HLD	0.2	0	0	0	0	2	2	4.23	1.30	19	W 1-4
Jun 27	vs. Las Vegas Athletics	W	1.0	0	0	0	0	0	2	4.30	1.27	16	W 2-5
Jun 23	vs. Baltimore Orioles		1.0	0	0	0	0	0	3	4.42	1.31	16	W 1-5
Jun 20	@ Las Vegas Athletics		1.2	0	0	0	0	1	3	4.54	1.35	24	W 7-0
Jun 18	@ Las Vegas Athletics		1.0	0	0	0	0	2	1	4.76	1.38	21	L 0-5
Jun 14	vs. Tampa Bay Rays		1.0	0	0	0	0	0	1	4.91	1.36	10	L 8-3
Jun 12	vs. Tampa Bay Rays	SV	0.1	0	0	0	0	1	1	5.06	1.41	9	W 3-4
Jun 10	vs. Houston Astros	W	1.0	0	0	0	0	1	2	5.12	1.39	21	W 2-3
Jun 8	vs. Houston Astros		1.0	0	0	0	0	2	3	5.28	1.40	25	L 5-4
Jun 6	@ Los Angeles Dodgers		2.0	0	0	0	0	2	3	5.46	1.38	34	L 2-9
Jun 3	vs. Colorado Rockies		1.0	2	1	1	0	0	0	5.86	1.41	24	W 4-11
Jun 1	vs. Colorado Rockies	HLD	1.0	0	0	0	0	1	1	5.74	1.39	16	L 9-8
May 29	@ Tampa Bay Rays	L	0.1	3	4	4	2	1	0	5.96	1.40	19	L 5-8
May 28	@ Detroit Tigers		1.0	0	0	0	0	2	1	4.62	1.26	22	W 7-1
May 23	vs. Texas Rangers	HLD	1.0	1	1	1	1	0	1	4.81	1.23	15	W 2-5
May 21	vs. Las Vegas Athletics	L	1.0	0	1	0	0	2	0	4.63	1.24	19	L 3-2
May 20	vs. Las Vegas Athletics	HLD	0.1	0	1	1	0	0	0	4.84	1.21	11	L 6-5
May 18	vs. Las Vegas Athletics		0.1	2	1	1	0	2	0	4.50	1.23	24	W 1-2
May 13	@ Cleveland Guardians		1.0	1	0	0	0	0	2	4.15	1.06	19	L 2-4
May 10	@ Toronto Blue Jays		1.0	0	0	0	0	0	2	4.35	1.06	15	W 6-1
May 5	vs. Chicago White Sox	SV	1.1	0	0	0	0	2	3	4.58	1.12	33	W 3-4
May 2	vs. New York Mets	W	2.0	0	0	0	0	1	1	4.91	1.09	23	W 3-4
Apr 29	@ Chicago White Sox	BS	2.0	1	1	1	0	0	4	5.51	1.16	36	L 2-3
Apr 26	@ Kansas City Royals	HLD	1.2	0	0	0	0	1	1	5.65	1.26	20	L 9-11
Apr 24	@ Kansas City Royals		1.0	0	0	0	0	0	2	6.39	1.34	13	L 3-6
Apr 22	vs. Toronto Blue Jays	HLD	1.1	1	2	2	0	1	1	6.94	1.46	21	W 3-7
Apr 18	vs. San Diego Padres	L	1.0	3	2	2	0	2	0	6.10	1.45	23	L 4-1
Apr 14	@ New York Yankees		1.0	1	0	0	0	0	2	4.82	1.07	27	W 7-1
Apr 11	@ Cincinnati Reds		2.0	2	1	1	0	0	1	5.40	1.08	43	L 3-7
Apr 8	vs. Atlanta Braves		1.2	2	2	2	0	2	2	5.68	1.11	42	L 8-2
Apr 5	vs. Seattle Mariners		2.0	0	2	2	0	1	5	3.86	0.64	27	W 7-8
Apr 1	@ Chicago Cubs		0.2	1	1	0	0	1	1	0.00	0.75	21	L 2-6
Mar 27	@ Houston Astros	W	2.0	0	0	0	0	0	2	0.00	0.00	23	W 6-2
No games against that opponent.
Total		4-4	67.0	48	33	30	7	39	88	4.03	1.30	1,234
Total	2 games	0-0	2.0	2	1	1	0	0	0	4.50	1.00	17
Total	3 games	0-0	3.2	5	2	2	0	3	4	4.91	2.18	86
Total	1 game	0-0	1.0	0	0	0	0	0	3	0.00	0.00	16
Total	1 game	0-0	1.1	0	0	0	0	1	2	0.00	0.75	24
Total	1 game	0-0	0.2	1	1	0	0	1	1	0.00	3.00	21
Total	3 games	0-0	4.1	3	3	3	1	3	8	6.23	1.38	93
Total	3 games	0-0	4.1	3	1	1	0	0	5	2.08	0.69	86
Total	1 game	0-0	1.0	1	0	0	0	0	2	0.00	1.00	19
Total	2 games	0-0	2.0	2	1	1	0	1	1	4.50	1.50	40
Total	3 games	0-0	3.0	1	1	1	1	2	3	3.00	1.00	49
Total	4 games	2-0	4.1	2	1	1	0	3	7	2.08	1.15	82
Total	3 games	0-0	3.2	1	0	0	0	1	5	0.00	0.55	57
Total	7 games	1-1	6.0	2	3	2	0	9	8	3.00	1.83	134
Total	3 games	0-0	3.2	1	1	1	1	2	5	2.45	0.82	57
Total	3 games	0-0	3.1	1	0	0	0	2	2	0.00	0.90	41
Total	4 games	0-0	3.2	5	3	3	0	1	7	7.36	1.64	71
Total	1 game	0-0	1.1	1	1	1	1	0	2	6.75	0.75	27
Total	1 game	1-0	2.0	0	0	0	0	1	1	0.00	0.50	23
Total	1 game	0-0	1.0	1	0	0	0	0	2	0.00	1.00	27
Total	1 game	0-0	0.1	0	0	0	0	0	1	0.00	0.00	6
Total	1 game	0-1	1.0	3	2	2	0	2	0	18.00	5.00	23
Total	2 games	0-0	1.0	1	0	0	0	0	2	0.00	1.00	16
Total	3 games	0-1	3.2	2	3	2	0	2	6	4.91	1.09	46
Total	1 game	0-0	1.0	1	0	0	0	1	2	0.00	2.00	27
Total	3 games	0-1	1.2	3	4	4	2	2	2	21.60	3.00	38
Total	3 games	0-0	3.0	2	1	1	1	0	4	3.00	0.67	49
Total	2 games	0-0	2.1	1	2	2	0	1	3	7.71	0.86	36
Total	1 game	0-0	0.2	3	2	2	0	1	0	27.00	6.00	23

AVG, OBP, SLG, ERA and WHIP are season-to-date through each game, not that game alone — so the column reads as a trend and its last value is the season figure. They stay season-to-date when the log is filtered by opponent; the figure for the filtered games is the one in the Total row. The second game of a doubleheader is marked (2).