UFC on FOX 5: Henderson vs. Diaz participants will step on the scales at the KeyArena in Seattle, Washington, as part of the official weigh-in procedure ahead of this Saturday's stacked fight card. The event is headlined by Ben Henderson's second UFC Lightweight title defense, against the Octagon veteran Nate Diaz. Mauricio "Shogun" Rua fights Alexander Gustafsson in the co-main event of the night.

Also on the card, BJ Penn returns to the cage against Rory MacDonald, and Mike Swick fights Matt Brown in the main card opener.

Weigh-ins start at 7 P.M. EST, live stream is available in this very post. As always, stay tuned to LowKick.com for more post-fight coverage.

Card via MMAMania.com, outer photo via Twitter (@SeanShelby)

FOX Main Event:

155 lbs.: UFC Lightweight Champion Ben Henderson (154.6) vs. Nate Diaz (155.6)

FOX Main Card (8 p.m. ET):

205 lbs.: Alexander Gustafsson (205.4) vs. Mauricio Rua (205)
170 lbs.: Rory MacDonald (170.2) vs. B.J. Penn (168.2)
170 lbs.: Mike Swick (170) vs. Matt Brown (170.2)

FX Channel "Prelims" Card (5 p.m. ET):

155 lbs.: Jeremy Stephens (155.8) vs. Yves Edwards (155)
135 lbs.: Raphael Assuncao (136.4)** vs. Mike Easton (135)
155 lbs.: Ramsey Nijem (155.4) vs. Joe Proctor (154.6)
155 lbs.: Daron Cruickshank (155) vs. Henry Martinez (158.8)*
155 lbs.: Marcus LeVesseur (155.4) vs. Abel Trujillo (155.4)
145 lbs.: Nam Phan (145) vs. Dennis Siver (146)

Facebook "Prelims" Card (4:30 p.m. ET):

135 lbs.: Scott Jorgensen (135.2) vs. John Albert (136)

*Martinez has an additional two hours to make 156-pounds
**Assuncao has an additional two hours to make 136-pounds