Born in Rotherham, South Yorkshire, Brogan broke into the Rotherham squad towards the end of the 2006–07 season, soon becoming an automatic choice making 18 starts. On 30 April 2007, Brogan signed a 2-year contract with the Millers.
Brogan's rise to prominence began when he joined the Rotherham team towards the end of the 2006–07 season and soon became an essential player after making 18 starts. On April 30, 2007, he secured a two-year contract with the Millers.