Ryan Zeferjahn
Chicago CubsPSince 20242026 Season Percentiles
K79
85th
W3
66th
SV4
93th
ERA4.81
47th
WHIP1.5
49th
IP48.6
73th
Game Logs
Season
| August 2026 | |||||||||||
| Date | OPP | Dec | IP | H | ER | K | BB | HR | ERA | WHIP | wZRD |
| Aug 21, 2026 | @ SEA | L | 0.2 | 1 | 0 | 0 | 1 | 0 | 0.00 | 3.00 | 28 |
| Aug 17, 2026 | vs CWS | — | 1 | 2 | 2 | 1 | 1 | 1 | 18.00 | 3.00 | 11 |
| Aug 14, 2026 | vs STL | — | 1 | 1 | 0 | 2 | 1 | 0 | 0.00 | 2.00 | 60 |
| Aug 11, 2026 | @ WAS | — | 0.2 | 3 | 2 | 0 | 1 | 0 | 27.00 | 6.00 | 7 |
| Aug 9, 2026 | @ KC | — | 1 | 1 | 0 | 2 | 0 | 0 | 0.00 | 1.00 | 63 |
| Aug 5, 2026 | vs LA | — | 0.2 | 1 | 1 | 2 | 0 | 1 | 13.50 | 1.50 | 24 |
| Aug 4, 2026 | vs LA | — | 1 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0.00 | 41 |
| Aug 2, 2026 | vs MIL | SV | 1.2 | 2 | 0 | 4 | 0 | 0 | 0.00 | 1.20 | 95 |
| August 2026 | — | — | 5.8 | 11 | 5 | 11 | 4 | 2 | — | — | — |
| July 2026 | |||||||||||
| Date | OPP | Dec | IP | H | ER | K | BB | HR | ERA | WHIP | wZRD |
| Jul 27, 2026 | vs HOU | — | 1 | 2 | 1 | 2 | 0 | 0 | 9.00 | 2.00 | 24 |
| Jul 26, 2026 | @ SF | — | 1 | 1 | 0 | 2 | 0 | 0 | 0.00 | 1.00 | 63 |
| Jul 24, 2026 | @ SF | — | 1 | 0 | 0 | 1 | 1 | 0 | 0.00 | 1.00 | 49 |
| Jul 21, 2026 | vs STL | — | 1 | 1 | 0 | 3 | 0 | 0 | 0.00 | 1.00 | 71 |
| Jul 19, 2026 | vs DET | SV | 1 | 1 | 1 | 0 | 0 | 1 | 9.00 | 1.00 | 82 |
| Jul 17, 2026 | vs DET | — | 1 | 0 | 0 | 2 | 0 | 0 | 0.00 | 0.00 | 66 |
| Jul 12, 2026 | @ MIN | — | 1.1 | 1 | 1 | 2 | 0 | 1 | 6.75 | 0.75 | 29 |
| Jul 9, 2026 | @ TEX | — | 1 | 0 | 0 | 1 | 0 | 0 | 0.00 | 0.00 | 54 |
| Jul 8, 2026 | @ TEX | — | 1 | 1 | 0 | 2 | 0 | 0 | 0.00 | 1.00 | 63 |
| Jul 4, 2026 | vs BOS | — | 1.1 | 0 | 0 | 2 | 1 | 0 | 0.00 | 0.75 | 69 |
| July 2026 | — | — | 10.2 | 7 | 3 | 17 | 2 | 2 | — | — | — |
| June 2026 | |||||||||||
| Date | OPP | Dec | IP | H | ER | K | BB | HR | ERA | WHIP | wZRD |
| Jun 30, 2026 | @ SEA | — | 1 | 1 | 0 | 1 | 0 | 0 | 0.00 | 1.00 | 49 |
| Jun 28, 2026 | vs ATH | — | 0.2 | 0 | 0 | 2 | 2 | 0 | 0.00 | 3.00 | 53 |
| Jun 27, 2026 | vs ATH | W | 1 | 0 | 0 | 2 | 0 | 0 | 0.00 | 0.00 | 90 |
| Jun 23, 2026 | vs BAL | — | 1 | 0 | 0 | 3 | 0 | 0 | 0.00 | 0.00 | 73 |
| Jun 20, 2026 | @ ATH | — | 1.2 | 0 | 0 | 3 | 1 | 0 | 0.00 | 0.60 | 75 |
| Jun 18, 2026 | @ ATH | — | 1 | 0 | 0 | 1 | 2 | 0 | 0.00 | 2.00 | 46 |
| Jun 14, 2026 | vs TB | — | 1 | 0 | 0 | 1 | 0 | 0 | 0.00 | 0.00 | 54 |
| Jun 12, 2026 | vs TB | SV | 0.1 | 0 | 0 | 1 | 1 | 0 | 0.00 | 3.00 | 86 |
| Jun 10, 2026 | vs HOU | W | 1 | 0 | 0 | 2 | 1 | 0 | 0.00 | 1.00 | 88 |
| Jun 8, 2026 | vs HOU | — | 1 | 0 | 0 | 3 | 2 | 0 | 0.00 | 2.00 | 70 |
| Jun 6, 2026 | @ LA | — | 2 | 0 | 0 | 3 | 2 | 0 | 0.00 | 1.00 | 75 |
| Jun 3, 2026 | vs COL | — | 1 | 2 | 1 | 0 | 0 | 0 | 9.00 | 2.00 | 17 |
| Jun 1, 2026 | vs COL | — | 1 | 0 | 0 | 1 | 1 | 0 | 0.00 | 1.00 | 49 |
| June 2026 | — | — | 12.5 | 3 | 1 | 23 | 12 | 0 | — | — | — |
| May 2026 | |||||||||||
| Date | OPP | Dec | IP | H | ER | K | BB | HR | ERA | WHIP | wZRD |
| May 29, 2026 | @ TB | L | 0.1 | 3 | 4 | 0 | 1 | 2 | 108.00 | 12.00 | 2 |
| May 28, 2026 | @ DET | — | 1 | 0 | 0 | 1 | 2 | 0 | 0.00 | 2.00 | 46 |
| May 23, 2026 | vs TEX | — | 1 | 1 | 1 | 1 | 0 | 1 | 9.00 | 1.00 | 22 |
| May 21, 2026 | vs ATH | L | 1 | 0 | 0 | 0 | 2 | 0 | 0.00 | 2.00 | 33 |
| May 20, 2026 | vs ATH | — | 0.1 | 0 | 1 | 0 | 0 | 0 | 27.00 | 0.00 | 16 |
| May 18, 2026 | vs ATH | — | 0.1 | 2 | 1 | 0 | 2 | 0 | 27.00 | 12.00 | 12 |
| May 13, 2026 | @ CLE | — | 1 | 1 | 0 | 2 | 0 | 0 | 0.00 | 1.00 | 63 |
| May 10, 2026 | @ TOR | — | 1 | 0 | 0 | 2 | 0 | 0 | 0.00 | 0.00 | 66 |
| May 6, 2026 | vs CWS | SV | 1.1 | 0 | 0 | 3 | 2 | 0 | 0.00 | 1.50 | 94 |
| May 2026 | — | — | 6.4 | 7 | 7 | 9 | 9 | 3 | — | — | — |
| April 2026 | |||||||||||
| Date | OPP | Dec | IP | H | ER | K | BB | HR | ERA | WHIP | wZRD |
| Apr 29, 2026 | @ CWS | — | 2 | 1 | 1 | 4 | 0 | 0 | 4.50 | 0.50 | 66 |
| Apr 26, 2026 | @ KC | — | 1.2 | 0 | 0 | 1 | 1 | 0 | 0.00 | 0.60 | 65 |
| Apr 24, 2026 | @ KC | — | 1 | 0 | 0 | 2 | 0 | 0 | 0.00 | 0.00 | 66 |
| Apr 22, 2026 | vs TOR | — | 1.1 | 1 | 2 | 1 | 1 | 0 | 13.50 | 1.50 | 13 |
| Apr 19, 2026 | vs SD | L | 1 | 3 | 2 | 0 | 2 | 0 | 18.00 | 5.00 | 7 |
| Apr 11, 2026 | @ CIN | — | 2 | 2 | 1 | 1 | 0 | 0 | 4.50 | 1.00 | 28 |
| Apr 8, 2026 | vs ATL | — | 1.2 | 2 | 2 | 2 | 2 | 0 | 10.80 | 2.40 | 14 |
| Apr 5, 2026 | vs SEA | — | 2 | 0 | 2 | 5 | 1 | 0 | 9.00 | 0.50 | 36 |
| Apr 1, 2026 | @ CHC | — | 0.2 | 1 | 0 | 1 | 1 | 0 | 0.00 | 3.00 | 39 |
| April 2026 | — | — | 11.7 | 10 | 10 | 17 | 8 | 0 | — | — | — |
| March 2026 | |||||||||||
| Date | OPP | Dec | IP | H | ER | K | BB | HR | ERA | WHIP | wZRD |
| Mar 28, 2026 | @ HOU | W | 2 | 0 | 0 | 2 | 0 | 0 | 0.00 | 0.00 | 93 |
| March 2026 | — | — | 2.0 | 0 | 0 | 2 | 0 | 0 | — | — | — |
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