DWCS Week 4 start time: How to watch Rivera vs. Darby

The DWCS Week 4 start time is 7 p.m. ET, or 4 p.m. PT, on Tuesday, Sept. 1, as Dana White’s Contender Series returns to the Meta APEX in Las Vegas. U.S. viewers can stream the five-fight event live on Paramount+, according to Sherdog’s viewing guide published by Yahoo Sports.

The welterweight headliner matches Patrick Rivera against Adam Darby, two fighters arriving with six consecutive victories. Sherdog lists Rivera at 13-4 and Darby at 7-1.

How can I watch DWCS Week 4?

• Date: Tuesday, Sept. 1, 2026
• Start time: 7 p.m. ET / 4 p.m. PT
• Venue: Meta APEX, Las Vegas
• United States: Paramount+
• United Kingdom and Ireland: UFC Fight Pass at 12 a.m. BST on Wednesday, Sept. 2

Paramount+ describes the series as a live showcase for prospects competing while UFC CEO Dana White watches cageside. CBS Sports reports that each episode contains five bouts involving regional fighters pursuing UFC contracts, and that White’s signings are not determined only by who wins.

That makes the night more than a standard win-or-lose exercise. A fighter can make a case with the quality of the performance, while a victory does not automatically guarantee a contract.

DWCS Week 4 full fight card

• Patrick Rivera vs. Adam Darby, welterweights
• Brandon Holmes vs. Modestino Rodrigues
• Liam McCracken vs. Silvestre Sanchez
• Gabriel Lourenco vs. Charlie Cleveland
• Hunter Smith vs. Adam Livingston

Rivera has put together six straight wins since 2023, Sherdog reported, with five of those victories ending inside the distance. Darby is also on a six-fight run, with five finishes since his only professional defeat in 2022.

The listed card was current as of Aug. 31, according to Sherdog, so late bout changes remain possible. The date matters: CBS Sports’ Week 4 listing carried an Aug. 25 date, but its separate Week 3 coverage identifies Aug. 25 as Week 3. Sherdog specifically listed Week 4 for Sept. 1.

This story draws on original reporting from CBS Sports.