He led and faded to finish 11th to Regal Award in the Fred Best after beating only two runners home behind the Robert Heathcote-trained Rothfire in the Doomben 10,000.
Schweida believed Grafterburners was a tired horse after his winter campaign, as he returned home following his third placing in the Group 2 Arrowfield at Randwick in April.
“I thought his run in The Shorts was super and he was beaten less than two lengths,” Schweida said.
“The stewards said he got a bit of a trim up at the 600 metres and his rider (Jason Collett) had to sit up on him in the last 100 metres.