| Um Sang-back | |
| Position: | Pitcher |
| Team: | KT Wiz |
| Number: | 18 |
| Throws: | Right |
| Bats: | Right |
| Birth Date: | 4 October 1996 |
| Birth Place: | Seoul, South Korea |
| Debutleague: | KBO |
| Debutdate: | April 26 |
| Debutyear: | 2015 |
| Debutteam: | KT Wiz |
| Statyear: | May 31, 2024 |
| Stat1label: | Win–loss record |
| Stat1value: | 36–40 |
| Stat2label: | Earned run average |
| Stat2value: | 4.84 |
| Stat3label: | Strikeouts |
| Stat3value: | 581 |
| Teams: |
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Um Sang-back (; born October 4, 1996, in Seoul) is a South Korean pitcher for the KT Wiz in the Korea Baseball Organization (KBO).[1]