After being relegated to the WAFL upon the return of Gardiner in Round 13, he was brought back when Dean Cox broke his collarbone in the same game. He and Gardiner's first tandem game was a blowout, with Hawthorn's Peter Everitt beating them convincingly. Their next, and last, was largely better, with Seaby getting a season-high 31 hitouts. Gardiner was fined and again suspended indefinitely after a drunken car crash just days later, leaving Seaby to ruck without a specialised backup for a handful of weeks in which he performed admirably. Seaby returned to his position as secondary ruckman when Cox returned from injury and went on to be part of West Coast's 2006 Premiership team. He maintained his position during the 2007 season, continuing as backup to Dean Cox and occasionally playing as a tall forward.