Walker, who on Monday announced he'll retire at season's end, is among the Crows' 26-strong playing squad travelling to Perth. But coach Matthew Nicks is yet to decide if the 36-year-old will front against the ladder-leading Dockers on Friday night. Nicks said Walker was unlikely to be able to play six games in a row - the last two minor-round games and possibly four finals. First-choice ruckman Lachlan McAndrew will play after a one-game spell and forward Darcy Fogarty returns after serving a three-game suspension. But veteran forward Alex Neal-Bullen (family reasons) will remain in Adelaide, as will two-gamers Oscar Ryan and Archie Ludowyke.