| Result | Tournament |
|---|---|
| Brett Underwood defeated Dusty Yeager | 2024 Derby City Classic One Pocket |
| Brett Underwood defeated Bernell Dartez | 2024 Derby City Classic One Pocket |
| David Brown defeated Brett Underwood | 2024 Derby City Classic One Pocket |
| Oscar Dominguez defeated Brett Underwood | 2024 Derby City Classic One Pocket |
| Brett Underwood defeated Michael Ward | 2023 Rack's Carolina Classic 9-Ball |
| Eddie Wahdan defeated Brett Underwood | 2023 Rack's Carolina Classic 9-Ball |
| Brett Underwood defeated John Stallings | 2023 Rack's Carolina Classic 9-Ball |
| Brett Underwood defeated Jeff Abernathy | 2023 Rack's Carolina Classic 9-Ball |
| Brett Underwood defeated Eddie Wahdan | 2023 Rack's Carolina Classic 9-Ball |
| Brett Underwood defeated Chris Worsham | 2023 Rack's Carolina Classic 9-Ball |
| Brett Underwood defeated Eric Decosta | 2023 Rack's Carolina Classic 9-Ball |
| John Stallings defeated Brett Underwood | 2023 Rack's Carolina Classic 9-Ball |
| Marty Turpin defeated Brett Underwood | 2023 Derby City Classic One Pocket |
| Brett Underwood defeated Brandon Howard | 2023 Derby City Classic One Pocket |
| Brett Underwood defeated Kyle Ferguson | 2023 Derby City Classic One Pocket |
| Brett Underwood defeated Chris Salmons | 2023 Derby City Classic One Pocket |
| Dennis Wilson defeated Brett Underwood | 2023 Derby City Classic One Pocket |
| Brett Underwood defeated Tony Coleman | 2023 Derby City Classic Bank Pool |
| Brett Underwood defeated Rodney Wright | 2023 Derby City Classic Bank Pool |
| Brett Underwood defeated Mark Anderson | 2023 Derby City Classic Bank Pool |
| Danny Olson defeated Brett Underwood | 2023 Derby City Classic Bank Pool |
| Joshua Filler defeated Brett Underwood | 2023 Derby City Classic Bank Pool |
| Brett Underwood defeated Jeff Freeman | 2023 Derby City Classic 9-Ball |
| Max Eberle defeated Brett Underwood | 2023 Derby City Classic 9-Ball |
| Brett Underwood defeated Russell Carter | 2023 Derby City Classic 9-Ball |
| Brett Underwood defeated Chris Helman | 2023 Derby City Classic 9-Ball |
| Michael Levick defeated Brett Underwood | 2023 Derby City Classic 9-Ball |
| Pijus Labutis defeated Brett Underwood | 2022 Derby City Classic One Pocket |
| David Grossman defeated Brett Underwood | 2022 Derby City Classic One Pocket |
| Brett Underwood defeated Frank Spencer | 2022 Derby City Classic One Pocket |
| Darren Appleton defeated Brett Underwood | 2022 Derby City Classic Bank Pool |
| John Lynch defeated Brett Underwood | 2022 Derby City Classic Bank Pool |
| Brett Underwood defeated Kendall Vanover | 2022 Derby City Classic Bank Pool |
| Martin Warren defeated Brett Underwood | 2022 Derby City Classic 9-Ball |
| Nicholas De Leon defeated Brett Underwood | 2022 Derby City Classic 9-Ball |
| Brett Underwood defeated David D Walker | 2022 Derby City Classic 9-Ball |
| Brett Underwood defeated Ahmed Alsaedi | 2022 Derby City Classic 9-Ball |
| Brett Underwood defeated Peter Moosbrugger | 2022 Derby City Classic 9-Ball |
| Brett Underwood defeated Josh Pyles | 2020 Derby City Classic One Pocket |
| John Morra defeated Brett Underwood | 2020 Derby City Classic One Pocket |
| Tony Chohan defeated Brett Underwood | 2020 Derby City Classic One Pocket |
| Max Eberle defeated Brett Underwood | 2020 Derby City Classic Bank Pool |
| James Flood defeated Brett Underwood | 2020 Derby City Classic Bank Pool |
| Martin Sawinski defeated Brett Underwood | 2020 Derby City Classic 9-Ball |
| Corey Deuel defeated Brett Underwood | 2020 Derby City Classic 9-Ball |
| Tony Chohan defeated Brett Underwood | 2019 Derby City Classic One Pocket |
| Russell Parsons defeated Brett Underwood | 2019 Derby City Classic One Pocket |
| Brett Underwood defeated Bobby Alli | 2019 Derby City Classic Bank Pool |
| Nick Giordano defeated Brett Underwood | 2019 Derby City Classic Bank Pool |
| Brett Underwood defeated Paul Spaanstra | 2019 Derby City Classic Bank Pool |