Injuries and matchup dynamics drive Week 4 IDP decisions. Bosa’s absence opens rushing lanes and elevates a handful of streamers, while opposing offenses’ weaknesses create tackle opportunities for linebackers and safeties. Travis Hunter remains a hold in all leagues; Abdul Carter has shown a dependable 70%+ snap presence; Xavier McKinney and Xavier Watts offer upside in high-pass-volume games. Deep leaguers should eye Mykel Williams and Dee Winters as immediate stash targets, with careful fades for veteran big-play safeties.

Premium/Deep options like Sauce Gardner are worth a look in very deep formats, while the usual fades target players whose teams lean run-heavy or game-script favorable to the offense. The guide stresses balancing injury-driven upside with risk, leaning into snaps and matchup-based ceilings rather than chasing volatility. Week 4 IDP managers should lean into structural opportunities, not just past performance.

Bottom line: monitor snap counts, offensive line injuries, and game pace. Hold Hunters and Carter; stream Watts, McKinney, Williams; and stash Winters for longer-term upside. With Bosa out, the 49ers’ defense becomes a clearer source of opportunistic plays in this slate.

Fred Warner dominated Week 2, earning Defensive Player of the Week after a standout performance against New Orleans. He piled up 11 tackles (7 solo), added a pass breakup, and ripped a key forced fumble that stalled the Saints’ go-ahead bid in the third quarter, helping San Francisco pull away. His relentless range and playmaking ability continue to anchor SF’s defense.

Through two games, Warner’s 19 total tackles, two tackles for loss, a forced turnover, and a growing on-field chemistry with Dee Winters underline a potential Defensive Player of the Year run. For fantasy managers in IDP leagues, Warner remains a high-floor, high-ceiling cornerstone with obvious upside if health holds and SF stays aggressive defensively.