Halfback

Halfback, Half baked or half - baked stands for:

In American football the rear of the two running backs
In Rugby Union the two half- court player, see positions in Rugby Union
In Rugby League the scrum -half, see positions in Rugby League team # Background ( backs)
In football, mainly in Switzerland and today outdated game systems, defensive oriented midfielders or external rotor ( football)

Runningback

370500