Manly hooker Lachlan Croker forced into early retirement at 28: ‘My head is telling me it’s time’

Manly hooker Lachlan Croker has been forced to announce his NRL retirement, effective immediately, on medical advice.

The concussion-prone 28-year-old has suffered several head knocks over the past two seasons, the most recent of which happened at training in June.

Croker was restricted to just…