Dak Prescott and Cole Beasley or Terrance Williams, Dallas Cowboys

The San Francisco 49ers' recent string of bad defensive performances is by now well known. San Francisco has yielded an absurd an absurd 83 points and nearly 1,000 total yards over the past two games. Meanwhile, the Dallas' offense has been clicking a great deal under its rookie quarterback. 

Dallas is averaging 25.7 points per game and has seen its point output increase each week, from 19 in its season-opening loss to the New York Giants to 31 last week against the Chicago Bears. 

Prescott himself enters Week 4 as the 12-best fantasy quarterback. All said, he's averaging 273.3 yards and one touchdown per game, numbers that should increase against a bad 49ers defense. 

Who you stack Prescott with will depend on how much you rely on value this week. Beasley represents the obvious choice, as he has put up 20 receptions on 25 targets this season. Though, Williams becomes a solid under-the-radar add with Dez Bryant out of action. He's caught 7-of-8 passes for 122 yards in three games and will be taking on a larger role with Bryant out. 

Andrew Luck and Phillip Dorsett, Indianapolis Colts

Here, we can use an injury to formulate another solid stack option. This option is also enhanced due to the fact that T.Y. Hilton will be going up against a tough rookie corner in Jalen Ramsey on Sunday morning in London. Add in the injury to Donte Moncrief, and there's no reason to believe Luck won't target Dorsett a ton. 

Luck has put up over 300 yards and two touchdowns per game through three weeks. This has him as the seventh-best fantasy quarterback heading into Week 4. He's also takin on a Jaguars defense that's yielded the seventh-most fantasy points to quarterbacks on the season. 

Philip Rivers and Travis Benjamin, San Diego Chargers

There's so much going on here, and most of it is good for San Diego. First off, the New Orleans Saints have once again become a joke on defense. It ranks 31st in the NFL in scoring defense at 32 points per game, 31st in total defense and 25th against the pass. In fact, quarterbacks are completing 70 percent of their passes against the Saints with a 105.7 rating. 

As it relates to receivers, these numbers are even worse. Quarterbacks are completing 63 percent of their passes for a 102.7 quarterback rating when targeting receivers against the Saints this season. 

That's where Benjamin comes into play. He's catching over 80 percent of the passes thrown in is direction on the season. This has Benjamin as the 14th-best fantasy receivers heading into Week 4. Add in Rivers' ranking among the top half of fantasy quarterbacks, and this is a prime stack option right here. 

Joe Flacco and Dennis Pitta, Baltimore Ravens

Flacco and Pitta are back at it again after a two-plus year hiatus when the latter was injured. Pitta has caught 18-of-24 targets for 183 yards in the first three games. This has him as a true TE1 option heading into Sunday's game against the Oakland Raiders. 

Also important to note, Oakland has been among the worst defenses in covering tight ends over the past season-plus. Tight ends have caught 14-of-22 passes for 245 yards with a touchdown against the Raiders this season. In fact, quarterbacks boast a 116.7 rating when targeting tight ends this season.