Wingback
This is the wing defender in your team, who has the largest effect upon your wing defence ratings.
Wingbacks also contribute to attack ratings, through the use of their wing skill.
Can also be played as a Defensive Wingback or an Offensive Wingback or Wingback toward Middle.
Contribution to Wing Attack Ratings
The largest contributor to each wing attack rating is the wing skill of your wingers. Here are the components of left wing attack in the order of their relative contribution as listed in the rules:
1. Winger left winger 2. Scoring forwards 3. Passing left winger 4. Passing left inner midfielder 5. Winger left wing back
So wing skill on your winger, especially if played offensive gives you more wing attack than the wing skill of your wingback.
How to play your Wingback
Wing skill on wingbacks is helpful, but it can't be relied-on to deliver a wing attack on its own like the wing skill of a good winger can. However, It can add to an already good wing attack that you get from playing a winger on the same side as the wingback. You can do this by playing a wingback "normal".
You can also get a larger boost to the wing attack by playing your wingback "offensive", but this should only be used with caution as it is an extreme order that reduces the defensive qualities of the player for the gain of some more wing attack.
A wingback played "defensive" contributes very little to the wing attack, so little that it is considered that defense is the only skill needed for that position.
A "normal" wingback gives you the maximum skill contribution by the player with-out any penalty to the overall performance of the player, just like other "normal" postitions in your starting 11.
Rules of Thumb
There are two good rules of thumb when considering how to play your wingback:
1) Am I playing a winger on that side? If not, then a defensive wingback would most likely be best. If you are mounting a viable wing attack, then a normal or offensive wingback could help make it even better.
2) Does my opponent have decent wing attacks on that side? If so, then perhaps a defensive wingback would be helpful to dull their attacks. If not, then you can play a normal wingback much more freely. You can also take the extreme step of playing an offensive wingback, but newbies should do some reserach before taking that step.
So, having a player that can be played as a normal wingback on your team is handy because they can also be used as a defensive wingback easily and give your team some added flexibility.