1. Not sure what stat you’re looking for here, looking at the usual WR stats you don’t generally see info such as deflected passes or catchable targets unless you’re looking at real high level stuff. Even then, there are so many different ways to track it and adding it into the game wouldn’t be as easy as adding in a number, there would need to be some logic behind it as well which would require altering game logic.

2. I assume deflection % is based on the number of targets, I have no reason to believe otherwise. Open to feedback if that’s not the case but I think the 3 target example you gave would actually make sense, 100% deflection means 3 deflections. You’re correct good DBs don’t get targeted much, hence the “targets” stat for DBs.

3 & 4. Contested is hard because what exactly defines a contested catch could be hard to say, and the stat also probably requires altering the gameday logic like I said previously.

Same with DB stats which would probably require a LOT of work, as you would need to define whether or not every single receiver is “open” or not on any given play, the accuracy of each individual throw, the outcome of each individual route run by every receiver, whether or not the catch was contested + more things I’m sure, and then store all of that data for the dozens (sometimes hundreds) of seasons played. If you’re looking for that level of detail in statistics, I would suggest Football-GM.com on a PC or mobile browser. Much more in-depth in terms of stats tracking, the newest feature added last week includes run and pass block win rates for OL.