2023 Stats
W-L
0-0
ERA
0.00
WHIP
0.00
K
0
SV
0
Rest-of-Season Projections

Signs NRI deal with Rockies
Koch signed a minor-league contract with the Rockies on Nov. 22 and received an invitation to major-league spring training.
ANALYSIS
Koch spent the 2022 season with the Mariners, and struggled to an 8.31 ERA over 4.1 innings of work in four appearances. The right-hander has an outside chance of making the Rockies out of spring training with a strong showing in the Cactus League.
Koch spent the 2022 season with the Mariners, and struggled to an 8.31 ERA over 4.1 innings of work in four appearances. The right-hander has an outside chance of making the Rockies out of spring training with a strong showing in the Cactus League.
Pitching Stats
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2022
2019
2018
2017
Minor League Game Log

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Left/Right Pitching Splits
Since 2021
-17%
BAA vs RHP
2023
No Stats
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2021vs Left | .300 | 2 | 0 | 3 | 1 | |||
Since 2021vs Right | .250 | 1 | 1 | 2 | 1 | |||
2023vs Left | 0 | 0 | 0 | 0 | 0 | |||
2023vs Right | 0 | 0 | 0 | 0 | 0 | |||
2022vs Left | .300 | 2 | 0 | 3 | 1 | |||
2022vs Right | .250 | 1 | 1 | 2 | 1 | |||
2021vs Left | 0 | 0 | 0 | 0 | 0 | |||
2021vs Right | 0 | 0 | 0 | 0 | 0 | |||
More Splits→ | View More Split Stats |
Home/Away Pitching Splits
Since 2021
-100%
ERA at Home
2023
No Stats
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2021Home | 0.00 | 0.33 | 3.0 | 9.0 | 0.0 | ||||
Since 2021Away | 27.00 | 3.75 | 1.1 | 0.0 | 6.8 | ||||
2023Home | 0 | 0 | 0 | 0 | 0 | ||||
2023Away | 0 | 0 | 0 | 0 | 0 | ||||
2022Home | 0.00 | 0.33 | 3.0 | 9.0 | 0.0 | ||||
2022Away | 27.00 | 3.75 | 1.1 | 0.0 | 6.8 | ||||
2021Home | 0 | 0 | 0 | 0 | 0 | ||||
2021Away | 0 | 0 | 0 | 0 | 0 | ||||
More Splits→ | View More Split Stats |
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Past Fantasy Outlooks
2019
2017
Koch made 14 starts and five relief appearances for a banged-up Diamondbacks team last season, filling in capably with a 4.15 ERA. He showed good control, walking just 6.1% of batters, but he managed just a 13.9% strikeout rate. His 5.83 FIP makes a serious step back appear more likely than even a modest step forward, as does his 5.96 ERA in 11 starts for Triple-A Reno. Scouts were never particularly impressed with Koch's repertoire, as his fastball averages just 91.8 mph and none of his secondaries are much better than average. His low walk rate stemmed at least partially from how hittable he is, as opposing batters made contact on 85.9% of swings (compared to 77.0% on average). He'll be a fifth or sixth starter this season and is likely a streamer at best in most formats.
More Fantasy News

Outrighted to minors
The Mariners outrighted Koch to Triple-A Tacoma after he cleared waivers Thursday.
ANALYSIS
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Designated for assignment
Koch was designated for assignment by the Mariners on Friday.
ANALYSIS
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Contract selected by Seattle
Koch's contract was selected by the Mariners on Wednesday, Ryan Divish of The Seattle Times reports.
ANALYSIS
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Joins Seattle on MiLB deal
Koch signed a minor-league contract with the Mariners on March 10.
ANALYSIS
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Joins Triple-A Columbus
Koch was assigned to Triple-A Columbus on Sunday.
ANALYSIS
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