West Coast young gun Harley Reid has limped off in pain during the Eagles’ loss to crosstown rivals Fremantle on Saturday.

Reid, 20, had a rollercoaster day in the heated clash.

The emerging superstar was tagged by Jaeger O’Meara and was involved in a series of early scuffles with the veteran.

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He gave away five free kicks in the first half, but also kicked a stunning goal on the run.

Reid kicked another goal from a set shot in the last quarter and promptly shushed the crowd, who had been jeering him throughout.

But minutes after that he was taken from the field in the hands of trainers after appearing to suffer a lower leg injury in a tackle.

Reid quickly disappeared down the race and didn’t return in the final 10 minutes.

West Coast coach Andrew McQualter said the youngster will undergo scans in the coming days.

“I just chatted to him - he’s hurt his ankle. I probably don’t have much more information than that,” he said after the match.

“You can see Harley put no weight on it as he was coming off, and then he was able to walk off.

“We’ll go away, scan it and see.”

The young gun was earlier knocked down by a heavy off-the-ball bump from Pat Voss.

Reid was running towards a stoppage when he was blindsided by a heavy hit from the Fremantle forward.

However, he was able to get back up and appeared to suffer no injury from the incident.

McQualter was proud of Reid’s efforts.

“I thought we saw a selfless version today of Harley,” McQualter said.

Reid even had a measured chat with an umpire at quarter-time to discuss several aspects of the game.

“I didn’t know that happened, but if that’s what Harley wants to do, that’s great,” McQualter said.

“And if the umpires are happy to chat, that’s good.

“It certainly beats screaming at them, which we’ve all wanted to do at times, and Harles has done.

“But that’s a good sign of maturity, if he’s growing in that space.”

Reid’s rollercoaster day was the main talking point from the Dockers’ 49-point win.

The final margin perhaps flattered the Eagles with Fremantle dominating throughout, but proving very wasteful in front of goal.

hayden Young tallied 23 disposals, seven clearances, three goals and 555m gained to win the Glendinning-Allan Medal in the 18.18 (126) to 12.5 (77) triumph in front of 54,384 fans at Optus Stadium on Saturday.

The 24-year-old came on as the sub in his first game back from hamstring surgery in last week’s one-point win over Collingwood, but he was unleashed from the very start of Saturday’s game before being subbed out early in the last.

Young was the dominant figure of the opening term, and his ruthlessness in front of goal when his teammates continually missed was another sign of just how important he is to the club’s flag push.

Michael Frederick kicked a career-high four goals, Andrew Brayshaw racked up 32 disposals and eight clearances, while rising star Murphy Reid (23 disposals, one goal) tallied a whopping 15 score involvements.

Four-time Glendinning-Allan Medallist Caleb Serong had to work hard for his 20 disposals and eight clearances under a tight tag from Brady Hough.

For West Coast, defender Reuben Ginbey kept Josh Treacy goalless from nine disposals, Tim Kelly found form with 26 disposals, eight clearances and two goals, and Reid (15 disposals, three clearances, two goals) battled hard amidst the boos.

The win keeps Fremantle (13-6) within percentage of the top four, while West Coast (1-18) have lost nine on the trot and are headed for their second wooden spoon in three seasons.

West Coast were forced into a late change when defender Harry Edwards injured his hamstring in the warm-up,

Harley Reid was target No.1 in the opening quarter.

First, he was involved in a wrestle with Fremantle veteran Jaeger O’Meara.

Then later in the term, he was caught unaware when he was flattened in an off-the-ball bump from Patrick Voss (three goals).

West Coast kept pace with Fremantle early, but two goals in a minute to Frederick, followed by two goals in a minute to Young, blew the scoreboard out to 40-12 by quarter-time.

Fremantle’s 14-7 clearance count in the opening quarter was ominous, with Young tallying 10 disposals, five clearances and two goals in a brilliant individual display.

Frederick’s third goal stretched the margin to 35 points early in the third quarter, but a dose of Harley Reid magic gave Eagles fans something to smile about.

Reid received a handpass on the wing and took a running bounce before nailing a goal from 47m.

Fremantle dominated the rest of the quarter, but their wasteful return of 1.6 meant the half-time margin was only 22 points.

The Dockers’ wobbles continued early in the third quarter as West Coast cut the margin to 18 points.

But goals to Jye Amiss and Voss - each of which was followed by a mini melee - gave Fremantle breathing space, before Young added another later in the quarter.

Fremantle blew the margin wide open with the first four goals of the final term.

- With AAP