Keenan Allen Is Traded to the 49ers as Mike Evans and Deebo Samuel Stay Hurt: Can You Start Him Against the Cowboys?

The San Francisco 49ers patched a depleted receiver room at the deadline. The 49ers acquired Keenan Allen from the Indianapolis Colts on Tuesday for a 2027 sixth-round pick. Allen, 34, was leading the Colts with 36 receptions at the time of the deal. He joins a team that has been missing Mike Evans (Achilles tendinitis) and Deebo Samuel (hamstring), and he could be in the lineup Sunday when San Francisco faces the Dallas Cowboys.

For fantasy managers, Allen is a short-term play with a clear expiration date. His value depends almost entirely on how many 49ers receivers are healthy, and the answer this week is: not many.

The trade

This is a low-risk rental. Allen signed a one-year deal with Indianapolis in August, worth up to $8.32 million, after the Colts needed receiver help. He gave them a reliable target, and now he gives Brock Purdy a dependable veteran for the second-half push.

San Francisco has been busy with the Colts this fall. The 49ers also acquired defensive tackle DeForest Buckner from Indianapolis for a 2027 fourth-round pick earlier in the trade window.

The injury picture in San Francisco

The 49ers' receiving corps has been thin for weeks. Head coach Kyle Shanahan said this week that he is not expecting Evans to be ready for Sunday, and fantasy injury trackers expect his Achilles tendinitis to keep him out at least one more game and possibly longer. Some reports have floated a Week 10 return, but Shanahan's comments point the other way.

Samuel is closer. He has missed the past three games with a hamstring strain, and Shanahan said the team expects him to at least start practicing on Wednesday. If Samuel practices fully by Friday, he could be back against Dallas. If he is limited, the 49ers may hold him out one more week.

Christian McCaffrey remains the engine of the offense, and the 49ers' 38-17 win over the Raiders in Week 9 showed they can still move the ball without their top receivers. But Purdy needs targets on third down, and that is where Allen fits.

Fantasy fallout: Allen's value this week

Allen has always been a precise route runner who wins on timing and short-area quickness rather than speed. That skill set does not age as quickly as raw athleticism, and it fits Shanahan's system well. DraftKings Network's analysis described Allen as a reliable safety blanket for Purdy on key third downs.

CBS Sports went further, saying Allen should be considered a WR2 in Week 10 against Dallas if Evans and Samuel both remain out. That is the optimistic view. The cautious view, from FTN, is that managers should not chase Allen on name recognition alone, because he will not command the same target share he had in Indianapolis once San Francisco is healthy.

The Verdexed take: both views are right, on different timelines. In Week 10, Allen is a legitimate flex option and a WR3 in deeper leagues, especially if Samuel does not play. He knows how to get open, Purdy is accurate, and the 49ers need bodies. Beyond the next two or three weeks, Allen is a bench piece. Once Evans and Samuel are back, he becomes the fourth option behind them and the tight end.

Who else is affected

Brock Purdy, QB: A small boost. Allen gives him a veteran who knows how to beat zone coverage, which helps on third down and in the red zone. Purdy stays a solid QB1 option against Dallas.

Deebo Samuel, WR: No change in his value when healthy. Allen is insurance, not a replacement. Samuel remains a WR2 when active.

Mike Evans, WR: Allen's arrival may hint at a longer absence for Evans. CBS Sports' Pete Prisco suggested that the trade itself could signal the team expects Evans to miss more time. Managers who have been holding Evans should keep holding, but plan for him to stay on the bench at least one more week.

Josh Downs and Tyler Warren, Colts: Downs was traded to Kansas City the same day, so the biggest beneficiary in Indianapolis is tight end Tyler Warren, who should see a larger share of the short targets.

Betting angle

The Cowboys-49ers matchup will be priced around San Francisco's health. The return of Samuel would matter more to the market than Allen's arrival, but Allen does raise the floor of the 49ers' passing game. Look at Allen's receptions prop once it opens: books may set it low because of his short practice week, and his role on third downs gives him a path to steady catches even with limited snaps.

For the Verdexed model's view on this game and every Week 10 matchup, see the Week 10 picks and the NFL predictions page.

What to do in your league

1. Add Allen in any league where he is available. He is a priority add for managers dealing with byes from the Bears, Eagles, Buccaneers and Broncos. 2. Start him as a flex in Week 10 if Samuel is ruled out. If Samuel plays, Allen drops to a deep-league flex. 3. Do not overpay. This is a two- or three-week window. Do not trade real assets for Allen. 4. Hold Evans. His long-term value remains much higher than Allen's.

What's next

Watch Wednesday's practice report for Samuel and Evans. That will set Allen's role for Sunday more than anything else. If both receivers sit again, Allen could see a starter's workload in his first game with his new team.