In the 2007–08 season, his twin brother Adam Griffiths joined the team. With the loss of key attacking players such as Nick Carle, Milton Rodríguez and Vaughan Coveny, Griffiths became the key to the Jets attack throughout the season. Early in the season Griffiths controversially assaulted a linesman, for which he was awarded a yellow card, narrowly escaping harsh punishment due to FIFA regulations. His club fined him two weeks' wages (one week of which was suspended). He later apologised for his actions. His performances on the pitch quickly lead him to be the focus of much media attention, with Griffiths remaining in career best form for much of the season.