| Undead Ed | Bullfrog Brewery | American IPA | |
| Undead Flame | Wayfinder Brewery | Smoked Beer | 5.2% |
| Undead Party Crasher | Clown Shoes | American Imperial Stout | 11.0% |
| Undead Rhapsody | Clown Shoes | American Strong Ale | 11.0% |
| Undefeated Champion | Fierce Beer Co | American IPA | |
| Undefeated Saison | Funky Buddha Lounge and Brewery | Saison | 7.7% |
| Under Crown | 18th Street Brewery | | |
| Under My Plum | The Libertine Brewing Company | | 8.4% |
| Under My Plum | MadTree | American Barleywine | 11.9% |
| Under Pressure | 7venth Sun Brewery | Saison | |
| Under Pressure | Sneaky Snake Brewery | Wild Ale | |
| Under the Kilt | Dragonmead Microbrewery | Scotch Ale / Wee Heavy | 7.8% |
| Under the Sea | Folkingebrew | New England IPA | 7.0% |
| Under the Stars | Cerebral Brewing | American Imperial Stout | 12.5% |
| Under the stars | Spartacus Brewing | New England IPA | 10.0% |