The queston is not if you can use the Pro skill in your Blitz! turn.
The question is:
Can you use it in your Blitz! turn and then again when the ball finally comes down from the kickoff?
The rules clarify the following things:
- Pro can be used on your own turn.
- Pro can be used on your opponents turn.
- Pro can be used to reroll a failed catch during kick-off.
This means, you can use pro for, let's say, a failed block. Then you can use it again when you fail to catch the kick-off. And again, if in your opponents turn, the ball scatters back to your player who is trying to catch it.
Seems unfair but the rules are clear.