There were no problems at the Ultimate Fight Night 20 weigh-ins as all the fighters successfully made weight at the first time of asking.

See below for the official results from the weigh-in.
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Main Card:

• Nate Diaz (155) vs. Gray Maynard (155)
• Evan Dunham (155) vs. Efrain Escudero (155)
• Tom Lawlor (185) vs. Aaron Simpson (185)
• Brad Blackburn (170) vs. Amir Sadollah (170)

Undercard:

• Chris Leben (185) vs. Jay Silva (185)
• Jesse Lennox (170) vs. Rick Story (170)
• Nik Lentz (155) vs. Thiago Tavares (155)
• Mike Guymon (170) vs. Rory MacDonald (170)
• Kyle Bradley (155) vs. Rafael dos Anjos (155)
• Gerald Harris (185) vs. John Salter (185)
• Nick Catone (185) vs. Jesse Forbes (185)