I'm very interested to see what Mosley brings to the table. To me, the wins over Vargas proved very little, because Vargas is a corpse.
Before those two fights, Mosley had a couple unimpressive decisions, and before that, six fights in a row where he didn't win (assuming you think DLH deserved to win their second fight).
The two losses to Forrest, the NC against Marquez, the controversial fight with DLH, followed by two losses to Winky.
If he doesn't look impressive against Collazo, it'll be interesting to see if people think he deserves a shot at Floyd, although I would still pay to see it.
I think Mosley beats Collazo by decision, but I think there's a good chance he doesn't look impressive.