Определение half-tracker в Английский Язык Английский Язык словарь
A ball bowled so as to pitch roughly half way down the wicket, ie. half-way between batsman and bowler. (From a slow bowler this is a poor delivery, likely to be hit to the boundary.)
2004: We'd got ourselves into a great position, and if I'd hit that half-tracker for six, we would've won the game. — Darren Lehmann.