The Dallas Cowboys will take on the Denver Broncos in a preseason NFL matchup on Saturday. Kickoff in Denver is set for 9 p.m. ET. The Broncos are favored by 4.5 points at home in the latest Cowboys vs. Broncos odds from Caesars Sportsbook, while the over/under is set at 33.5.

Before you make any Cowboys vs. Broncos picks or any other NFL predictions, you NEED to see which side SportsLine expert Larry Hartstein is on. 

A former lead writer for Covers and The Linemakers, Hartstein combines a vast network of Vegas sources with an analytical approach he honed while working for Pro Football Focus. Entering the 2022 NFL season, he is 427-344 all-time on NFL sides (plus $3,764 for $100 players), including 394-330 against the spread. Hartstein went 68-50 ATS (58 percent) and 8-3 on money-line plays last season for a profit of $1,552. Anybody who has been following him is WAY UP.

The expert knows Dallas has a potential breakout player on the outside in Jalen Tolbert, and the Cowboys have playing time available at wide receiver. The former South Alabama star racked up nearly 1,500 receiving yards last season in college and all reports are positive. For the Broncos, Josh Johnson is entrenched as the backup quarterback, which could give Denver a leg-up. Johnson made a start for Baltimore last season and threw for 304 yards with two touchdowns. He also brings more than a decade of experience at the NFL level. 

Now, Hartstein has locked in another confident against the spread pick for Cowboys vs. Broncos. We can tell you he's leaning Over the total, but he knows a crucial X-factor makes one side of the spread a MUST-BACK! You ABSOLUTELY need to see what it is before locking in any picks of your own.

Who wins Cowboys vs. Broncos on Saturday? And what critical X-factor makes one side of the spread a must-back? ... Join SportsLine right now to see which side of the Cowboys vs. Broncos spread to jump on, all from the expert who's on a roll in the NFL!