The quiet and unassuming South Australian announced his arrival on the national scene with a second consecutive victory in the prestigious Bay Sheffield Gift in Adelaide on Wednesday night.

He is one of only four runners to achieve the feat in the 125-year history of the event.

Caldow has also won a Stalwell Gift Winner's Gift.

He will try his hand at winning his first Burnie Gift today in an attempt to add another of the country's top footrace titles to his rapidly growing credentials.

''To win a second Bay Sheffield was pretty unbelievable really,'' he said.

''I didn't expect to push through and get it like I did - I didn't even expect to make the finals.

''It was great really - can't really explain it, it was the best feeling ever.''

Caldow said his second Bay Sheffield win from a mark of 3.75 metres probably ranked higher than his first in 2010 off 6.75m because not many expected him to be able to back up from his inaugural win.

''Last year a lot of people told me I should win,'' he said.

''This year there were a lot of people telling me I shouldn't win - I do like proving people wrong.

''I didn't think I would do that well because I was three metres back from last year - to make that up and win - I'm stoked.''

Caldow said his form had ''been on and off'' but accepted he was in good form now despite suffering some hamstring soreness after Bay Sheffield, which saw him pull out of Thursday night's Devonport Gift.

''I ran through it at the Bay so I will be able to run through it at Burnie,'' he said.

The Brighton Secondary year 12 graduate has been running since he was 10 and seriously for the past four.

Coached by Peter Burdett, Caldow faces a star-studded field in the Burnie Gift including multiple national 100m champion Joshua Ross, 2010 Stalwell Gift winner Tom Burbridge, 2010 Australian and Victorian sprinter of the year Matt Hargreaves and his Queanbeyan Gift-winning brother Chris, 2009 Stalwell winner Aaron Stubbs, 2006 winner Adrian Mott and the past two Burnie Gift winners Oliver Wurm and Robbie James.

''I have only competed in South Australia but started to do interstate stuff last year at Stalwell in the gift winner's gift,'' Caldow said.

''This is a whole other experience for me.

''I don't know about my chances at Burnie because I've been told my handicap is going back and don't know where I'm running from.''