Just watched AZ/TT highlights. McMillan is obviously dangerous running after the catch, but also looks like he is very loose with the ball. He's only had one fumble so far this season (vs TT, maybe cost them the game), but it didn't take much of a punch to knock it out.

Here's the fumble with 2:20 left in the 4th:

https://www.youtube.com/watch?v=1gaSNH7B0KY&t=655s

Also check out this play in the 3rd Q to see how wild he can be with the ball while running.

https://www.youtube.com/watch?v=1gaSNH7B0KY&t=436s