Konata Mumpfield is worth a waiver claim this week because the Rams just lost Davante Adams to injured reserve and Mumpfield is the player stepping into the vacated slot work. The claim is not that he is now Matthew Stafford's clear second target — the evidence does not support that yet. The claim is narrower and still actionable: Mumpfield is the Rams' primary replacement slot receiver with a real path to weekly flex value while Adams is out, and a top-24 ceiling if Puka Nacua also misses time.
That distinction matters for how aggressively a fantasy manager should bid. This is not a locked-in starter who just inherited a passing offense outright. It is a role opening up in the slot of a run-first, play-action scheme, with real competition still on the roster behind him. The opportunity is legitimate. The certainty is not.
Who Still Stands Between Mumpfield and Stafford's Targets
Puka Nacua is the single most important variable in this equation, and he is not out — he was listed as questionable for Week 7 with a calf injury. If Nacua plays, Mumpfield reverts to a complementary role behind him, tight end Tyler Higbee, and the Rams' running game. The top-24 scenario in the proposed thesis only activates if Nacua is sidelined too, and nothing in the current reporting guarantees that.
Behind Mumpfield on the depth chart sits a real crowd. Tutu Atwell was reacquired from Miami in an August 27 trade that sent running back Jarquez Hunter the other way, and he competes for rotational receiver snaps and return work. Rookie CJ Daniels, a sixth-round pick out of Miami, was the clearest offseason addition at the position, though a 2026 depth chart currently places Mumpfield ahead of him at left receiver. Jordan Whittington and Xavier Smith round out the competition for whatever snaps Adams' absence frees up. None of these players have been shown to have taken over the role outright — but none of them have gone away, either.
On the play-calling side, Sean McVay remains the head coach, but Mike LaFleur left after the 2025 season to become Arizona's head coach, and Nathan Scheelhaase — previously the Rams' pass-game coordinator — was promoted to offensive coordinator in February. Matthew Stafford remains the starting quarterback with no reported change. That continuity at quarterback is a mild positive for Mumpfield: he is not trying to build rapport with a new passer, only to win more snaps within a scheme that has not fundamentally changed.
The Week 3 Snapshot That Started the Buzz
The strongest evidence for Mumpfield so far comes from Week 3, when Nacua was also unavailable. Mumpfield caught 4 passes for 93 yards and a touchdown on 8 targets, with a route-participation rate in the high-70s percent and a 17.4% target-per-route rate by one charting source. A second source logged a 16.6-yard average depth of target in that game. That is a receiver being targeted down the field on a high share of his routes, not simply absorbing checkdowns because the starters were out.
The caveat is unavoidable: this is one game. Through five games of the season, Mumpfield's full-season line sits at 8 receptions for 127 yards and a touchdown — meaning almost all of his production to date is concentrated in that single Week 3 outing. A fantasy manager should treat the Week 3 numbers as proof of ceiling, not as a weekly floor.
Snap Share Is the More Durable Signal
More convincing than any single stat line is the snap-share pattern. During the stretch in Weeks 2 and 3 when Nacua was unavailable, Mumpfield reportedly hovered around a 70% offensive snap share. Snap share is less prone to game-script noise than targets or yardage, and a number that high signals the coaching staff trusts him on the field in three-receiver sets, not just as a situational change-of-pace piece. One waiver-wire analysis went further, describing him as having outproduced every other Rams wideout by a wide margin across productive measures so far this season.
The combination of high route participation and a favorable depth of target suggests the Rams are using Mumpfield as a real route-runner in the passing game rather than parking him underneath. That is the kind of role that can hold up even if his per-game box score stays inconsistent week to week.
The Honest Case Against Adding Him
The strongest objection here is straightforward: Adams' absence alone may not be enough. Nacua, not Adams, has been the more important receiver in this offense, and if he returns healthy for Week 7, Mumpfield's route share and target volume could shrink back toward what they were before Adams went down. A five-game season line of 8 catches for 127 yards and one score is a legitimately thin sample, and market pricing reflects that skepticism — one start/sit projection for Week 7 pegged Mumpfield at roughly 2.7 receptions and 34.4 yards, numbers that look nothing like a locked-in top-24 receiver.
That objection is fair, and it is the reason this article does not argue Mumpfield is already a weekly must-start. But it undersells the part of the profile that is not dependent on Nacua sitting out: Adams is already on injured reserve and is expected to miss an extended stretch, independent of whatever happens with Nacua's calf. Even in a worst case where Nacua plays every remaining week, Mumpfield still projects to see expanded slot snaps relative to his pre-injury role, because Adams' vacancy alone reshuffles the receiver rotation. The Nacua scenario is the ceiling case, not the entire argument.
What To Do About It This Week
Claim Mumpfield now, particularly in deeper and 12-team formats where the waiver pool at receiver thins out quickly. Slot him in as a speculative flex option while Adams remains out, understanding that his floor will fluctuate with target competition from Atwell, Whittington, Daniels and Smith. Do not bench a reliable flex option to force Mumpfield into the lineup off one big game. The more useful approach is to monitor Nacua's calf status each week: if Nacua sits, Mumpfield's role expands toward a genuine top-24 ceiling, and he becomes a confident flex-or-better start. If Nacua plays, treat Mumpfield as a roster-stash with spot-start appeal rather than a lineup lock.