Cooper Kupp and Stefon Diggs have been on opposite sides of 23 real dynasty trades.
Not simulations and not a calculator lining up two numbers. Every one of them is a completed trade from a public Sleeper league, graded at the player values that were current on the day it happened.
None of them were a straight one-for-one. Every time these two crossed, something else was attached to close it.
In 3 of these deals exactly one side had to attach something extra, split 2 to 1 between the Cooper Kupp side and the Stefon Diggs side. That is too close, and too small a sample, to call either player the more valuable.
Everything above is priced on the day each deal happened, which is the only honest way to grade a completed trade. It is not what they cost now. Today Cooper Kupp prices at 17 and Stefon Diggs at 204, so the market currently rates Stefon Diggs about 12.0x the other. A pair can lean one way across its history and price the opposite way now; that gap is the whole reason to check the deal in front of you rather than the deal someone made in 2023.
Values as of 2026-07-24.
| Date | Margin | Went with Cooper Kupp | Went with Stefon Diggs |
|---|---|---|---|
| 2025-11-16 | -49% | 1 2nd | — |
| 2025-02-07 | -31% | Jalen Tolbert | Troy Franklin, Devin Singletary |
| 2025-02-06 | -10% | Isaiah Likely, Bryce Young, 1 1st | Baker Mayfield, Tyler Allgeier, Quentin Johnston |
| 2024-11-26 | -21% | Tank Dell | 1 1st, 1 2nd, 1 3rd |
| 2024-11-04 | -64% | Calvin Ridley | 1 1st |
| 2023-11-21 | +26% | Patrick Mahomes, Curtis Samuel, 1 1st | Calvin Ridley, Tua Tagovailoa |
| 2023-09-02 | +4% | Keenan Allen, Alvin Kamara, Jerry Jeudy | Ryan Tannehill, Brandon Aiyuk |
| 2023-07-26 | +19% | Travis Etienne, 1 1st, 1 3rd | David Montgomery, 1 1st, 1 2nd |
| 2023-06-01 | -17% | Jordan Addison | Christian Watson |
| 2023-03-10 | -22% | Jalen Tolbert | Khalil Shakir |
Read each row as: Cooper Kupp, plus anything in the third column, was traded for Stefon Diggs plus anything in the fourth. An em dash means that side sent nobody else. Margin is the value gap at that day’s prices from the side that received Cooper Kupp; positive means that side came out ahead.
Across all 23, the whole-deal value gap runs -10.5% from the side that received Cooper Kupp, so the side ending up with Stefon Diggs has generally come out ahead on face value. That measures the entire trade, every piece included, not these two players against each other.
A calculator answers “is Cooper Kupp for Stefon Diggs fair” by subtracting one number from another, and it gives every manager in your league the same answer. That tells you nothing about whether the trade closes. What closes it is whether one side has to attach a piece, and which side that usually is. The 23 deals above are the record of what leagues actually agreed to when these two were on the table together.
How trade fairness actually works →
Every Cooper Kupp trade · Every Stefon Diggs trade
All players with real trade data →