PORT Adelaide's leading goalkicker of the past three seasons Jay Schulz is in contract limbo.

The Power are facing a massive challenge as their salary cap is near bursting, following the acquisition of Paddy Ryder in last year's trade period. 

Port Adelaide is considerably short of the terms desired by Schulz for 2016 and beyond.

Since the start of the start of the 2012 season, the 30-year-old has booted 175 goals.