Metcalfe was riding Exalted Marine in a heat of the National Apprentice Series over 1400m.
The Grant Young-trained mare was taken to the front and sped along in the lead to put a gap of seven lengths on the field approaching the 600m.
The $14 chance still maintained a healthy break despite beginning to tire with a furlong to go.
Exalted Marine was nabbed on the line. Video: Sky Racing
Metcalfe then eased up on Exalted Marine inside the final 100m, before trying to get busy…