He played 160 first grade games in the New South Wales Rugby League premiership with the Magpies, the fifth most capped player for the club.
He later said, "It was at Lidcombe – I had played third grade at noon and by first-grade kick off I was sitting on the hill with my mates eating a pie.
Then a few minutes later, Terry Lamb was carried off and all of a sudden there was an announcement on the public address system, 'Would Trevor Cogger please report to the Wests dressing room immediately.
[2] Although fearful he would not have a spot under new coach Warren Ryan,[3] Cogger's long first-grade career ended on a high note when he was selected to play centre in the semi-finals in 1991 after injuries to Stan Presdee and Tony Cosatto.
[8] Cogger remains actively involved in the game in both coaching juniors at Toukley, and playing oztag; including representing at a national level for the over-45s, in the same side as former team-mate Allan Fallah.