The league has announced that flex scheduling — that is, replacing a previously scheduled primetime game with another game with more national appeal — will start in Week 5 this year.
Per NFL.com’s Gregg Rosenthal, any flex scheduling that could happen between Weeks 5 and 10 will come with a stipulation: “The NFL can’t change the tentative Sunday Night Football game every week. The league may flex up to two games total into Sunday night between Weeks 5-10. The rest of the flexible schedule procedures from previous years remains intact. After Week 11, the NFL can flex any Sunday night game.”
In past years, the option to flex games in or out of primetime spots didn’t begin until Week 11.