loose forward

US /ˌluːs ˈfɔːr.wərd/
UK /ˌluːs ˈfɔːr.wərd/
"loose forward" picture
1.

a player in the scrum who is not in the front row, typically a flanker or number eight

:
The loose forward made a crucial tackle to stop the opposition's attack.
Both flankers and the number eight are considered loose forwards.