| Result | Tournament |
|---|---|
| Omar Al-Shaheen defeated Mark Otto | 2020 Derby City Classic Bank Pool |
| Ruslan Chinakhov defeated Mark Otto | 2019 Derby City Classic Bank Pool |
| Nick Carrelli defeated Mark Otto | 2018 Derby City Classic Bank Pool |
| Steven Murphy defeated Mark Otto | 2017 Derby City Classic Bank Pool |
| Kaelin Conkright defeated Mark Otto | 2017 Derby City Classic Bank Pool |
| Mark Otto defeated Josh Ludlum | 2016 Derby City Classic Bank Pool |
| Ko Ping-Chung defeated Mark Otto | 2016 Derby City Classic Bank Pool |
| John Meyers defeated Mark Otto | 2016 Derby City Classic Bank Pool |
| Jason Klatt defeated Mark Otto | 2015 Derby City Classic Bank Pool |
| Rob Hart defeated Mark Otto | 2015 Derby City Classic Bank Pool |
| Mark Otto defeated Erik Phillips | 2015 Derby City Classic Bank Pool |
| John Gabriel defeated Mark Otto | 2014 Derby City Classic Bank Pool |