[3] Palmer was a key member of Western Australia's victorious 2007 AFL Under 18 Championships side, averaging 32 possessions and 3 goals per game.

[6] In his second match he was awarded the AFL Rising Star nomination for his outstanding performance in the Western Derby,[7] despite receiving a gash to his head in the opening quarter.

[8] After being nominated in Round 3, Palmer won the 2008 AFL Rising Star ahead of Cyril Rioli from Hawthorn with 8 of the 9 judges voting him as the best emerging player.

[11] In 2018 he returned to Western Australia and joined Swan Districts in the West Australian Football League (WAFL).

No horses or reinsmen were injured, but there were calls for Palmer to be banned for life from racetracks due to the dangerous act.