Dak Prescott isn't as widely available as Mariota, though he too is available in over 50% of leagues as of Thursday morning.
His Week 10 fantasy performance was right up there with Mariota's, finishing as QB7 with 21.7 fantasy points. Week 9 wasn't an especially promising one (QB18, 14.8 fantasy points), and his game before that saw him finish at QB8 with 20.2 fantasy points in Week 7.
The hiccup over those three games was against the Tennessee Titans, who have been stingy against quarterbacks, allowing bottom-five fantasy numbers to the position.
This week's matchup is on the far opposite end of the spectrum, taking on an Atlanta Falcons squad that allows the fourth-most fantasy points per game to the position. The Falcons rank only 29th in numberFire's Adjusted Defensive Passing Detroit.