Bouncing on a trampline has cost recruit Sharrod Wellingham the chance to play in the rest of the NAB Cup season.
Wellingham, who impressed coach John Worsfold with his first outing for the club last Saturday, hurt his ankle while jumping on the mat. He was later diagnosed with ligament damage.
According the Eagles website, the former Collingwood midfield won't require surgery but will be in a moon boot for the next few weeks.
West Coast's next match in the pre-season series is against the Magpies on Sunday week.
Worsfold has sung the praises of Wellingham, saying his charge showed why the Eagles snared him with his first-up display.
The Eagles gave up pick 17 to lure Wellingham home to Perth to boost an already potent midfield.
Wellingham sat out game one against Geelong before being unveiled against arch rivals Fremantle in game three.
The 24-year-old was influential with eight disposals, two clearances and three tackles in the 24-point win.
"(It was a) short hit-out for him but he showed why we picked him," Worsfold said. "We know why we've got him here and what role he's going to play and he did it well."
Sam Butler, Josh Kennedy, Beau Waters, Dean Cox and Matt Rosa all sat out Saturday night and would need match fitness, Worsfold said.