Khan's team picking on lightweights.

After his win over Paulie, they wanted Katsidis and Casamayor and when they fights didn't go down they decided to wait on the winner of Marquez/Diaz 2 (which will be Marquez).

All those fighters i mentioned are natural lightweights.

At this point it's clear Khan's choice of opponent is either too old, too small, have no power or are not close to good enough to beat him. Khan's last 5 opponents will at least equal to one of the things i named previously.

Khans last 5 opponents
Fagan ( Useless although i give Khan the benefit of the doubt because he was coming off his devestating first loss )
Barrera ( Old and Small)
Kotelnik ( Top 10 JWW and had a title but no power)
Salita (Useless)
Malignaggi ( top 5 JWW but No power)

If Khan's next opponent is Marquez, he will probably be too old and small to beat Khan especially when we don't know how much he has left after Mayweather beat him up.

Khan should be fighting Marcos Maidana next, simple as.