Matt's must-start fantasy football waiver wire defenses (D/ST) to stream and start for Week 9 of the 2025 season. His fantasy defense start 'em, sit 'em picks.

We were forced to navigate Bye-mageddon in Week 8, and while the Week 9 slate isn't as brutal, we still have four NFL squads on byes. Trying to optimize your fantasy football roster? You've come to the right place! RotoBaller analyst Matt Donnelly drops his fantasy football must-start defenses (D/ST) for Week 9 of the 2025 season.

We are here to help with your Week 9 D/ST streamers, to give you the tools needed to set those winning lineups and dominate your matchups.

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