UFC on FOX 13 will take place on Saturday from the US Airways Center in Phoenix, Arizona and the televised prelims will be shown on Fox Sports 1. 
Initially, it was announced that the televised prelims would be shown on FOX at 5 p.m. ET/2 p.m. PT, but a Fox Sports official told TheMMAReport.com on Monday that the televised prelims will now be shown on Fox Sports 1.
The televised prelims on Fox Sports 1 will start at 5 p.m. ET/2 p.m. PT and will be a three hour broadcast with six fights including a flyweight bout between former title challenger John Moraga and UFC newcomer Willie Gates.
Following the conclusion of the televised prelims, the main card will begin at 8 p.m. ET/5 p.m. PT on FOX and will be headlined by former UFC heavyweight champion Junior dos Santos meeting Stipe Miocic. Also on the main card, Nate Diaz returns to the UFC and meets top title contender Rafael dos Anjos in a key lightweight bout.
The current UFC on FOX 13: Dos Santos vs. Miocic fight card is below.
Main Card: (FOX – 8 p.m. ET/5 p.m PT)
Junior dos Santos (16-3) vs. Stipe Miocic (12-1)
Nate Diaz (17-9) vs. Rafael dos Anjos (22-7)
Alistair Overeem (37-14, 1NC) vs. Stefan Struve (25-6)
Gabriel Gonzaga (16-8) vs. Matt Mitrione (8-3)
Preliminary Card: (Fox Sports 1 – 5 p.m. ET/2 p.m. PT)
John Moraga (15-3) vs. Willie Gates (11-4)
Claudia Gadelha (12-0) vs. Joanna Jedrzejczyk (7-0)
Ben Saunders (17-6-2) vs. Joe Riggs (40-14, 1NC)
Jamie Varner (21-10-1, 2NC) vs. Drew Dober (14-6)
Derek Brunson (12-3) vs. Ed Herman (22-10, 1NC)
Joe Ellenberger (15-1) vs. Bryan Barberena (9-2)
Preliminary Card: (Fight Pass – 3:30 p.m. ET/12:30 p.m. PT)
David Michaud (7-1) vs. Garett Whiteley (7-2)
Henry Cejudo (6-0) vs. Dustin Kimura (11-2)
Anthony Birchak (11-1) vs. Ian Entwistle (8-2)