Alright, here's the full picture on how Klint Kubiak adjusts after Ashton Jeanty's ankle injury.
First, the good news: Jeanty's sprained ankle (from the Aug 23 practice) is not a long-term issue — Ian Rapoport and Adam Schefter confirmed it's not the catastrophic knee injury everyone feared (from the Ashton Jeanty page). No timetable yet, but he should return sooner than initially thought.
The adjustment plan:
Mike Washington Jr. steps into the bell-cow role. He's the clear RB2, drafted in the 4th round as a Zach Charbonnet clone — 6'1", ~220 lbs, aggressive downhill runner. He already piled up 100+ rushing yards across two preseason games and was splitting first-team reps in camp (from the Mike Washington Jr. page). If Jeanty misses Week 1, Washington becomes the primary ball-carrier in Kubiak's outside-zone system.
Kubiak's Seattle background foreshadows the approach. On The Fantasy Headliners, analysts noted Kubiak "has utilized a two-back system the majority of his career" — that was Kenneth Walker III and Charbonnet in Seattle, and this same committee dynamic was already being built for Jeanty + Washington Jr. in Vegas. The injury just accelerates Washington's role.
The scheme itself doesn't change. Kubiak runs a Shanahan-style outside-zone with play-action and condensed splits. That system is OL-driven — Tyler Linderbaum (the highest-paid interior OL in the league) and Kolton Miller returning healthy matter more than which specific RB is carrying the ball ().
Short-term, expect more passing volume. Kirk Cousins (and eventually rookie Fernando Mendoza) may be asked to carry a heavier load early if Washington can't replicate Jeanty's tackle-breaking. But Fantasy Football Today noted that Kubiak helped both Walker and Charbonnet produce at a high level in Seattle — so Washington has a clear path to fantasy relevance while Jeanty heals.
Bottom line: This is a sprained ankle, not a season-ender. The Raiders built their whole offseason around Jeanty (Kubiak literally said the roster moves were made "with the notion of playing off of Jeanty"), so he's the guy when healthy. But Washington Jr. is one of the more predictable handcuffs in the league and becomes a viable flex in deeper leagues if Jeanty sits any games.