I was going to bring up this fight and pose this question. What are examples of good/great fighters being used as a tuneup? It’s rare, but it does happen. You got to be a great fighter to pull this off though.
This fight right here is a great example. Mayweather comes back after nearly 2 years, to make easy work of Marquez. Marquez was just outgunned. Everything he brings to the table, Mayweather does better, which is why this was such a bad match up for him stylistically. Anyone else would be crazy to pull this with Marquez.
Pacquaio basically did the same thing with Matthysse. He wanted to bounce back from a loss, and knew Lucas had nothing for him. Again one of those situations stylistically where whatever Lucas brings to the table, PAC does it at a much higher level.
Oscar used Gatti as a tuneup after his loss to Mosely.