后卫用英语择么说?

后卫:
1. rear guard
2. backfielder
3. fullback
4. full back
5. cover-point

Relative explainations:
<rearguard> <rear flank defender> <rear> <defence man> <deep defender> <center back> <backfield> <backcourtman> <cover point> <defender, back guard> <back> <guards> <full backs> <defenders>

Examples:
1. 约翰在这个队打后卫。
John plays back in the team.
2. 四分卫做了个要把球传给后卫的假动作，却把球传给了中卫。
The quarterback faked to the fullback and handed off to the halfback.
3. 传球给快跑中的后卫
Hit the running back with a pass.
4. 他现在改踢左后卫。
He's playing left-back now

This playing position.
后卫位置
An all-American fullback.
全美最佳后卫
The position of this player.
进攻后卫的位置
My wife is right guard.
妻子是右后卫，。
Jack is a full back of the team.
杰克是球队的后卫队员。
He's playing left-back now.