Mayne, a revelation in his debut season, had his first competitive run for 2009 with the Perth reserves side.
Stress fractures have kept the 20-year-old on the sidelines this season, but with seven AFL games remaining, development coach Steve Malaxos is confident Mayne will add to his 17 senior games before season's end.
"It was good to see him back out on a footy field, but he did more than just run around, he won some good contested ball and he actually handballed a lot," Malaxos said.
"We're expecting him to come through quite quickly with his footy – he looked quite good to me.
"We're hoping he’ll get back and play for Fremantle before the season's out."
Stress fractures in his shins have hindered van Berlo's first year at the club, but after two impressive games with the West Perth reserves, the 20-year-old played his first league game for the season.
Malaxos said the rookie-listed midfielder played 70 minutes and readjusted to the pace of league football instantly.
"His GPS results indicate he went really well from a running perspective," Malaxos said.
"His brother Nathan at Adelaide can really run and Jay can as well – it's definitely one of his key attributes.
"He just made one or two skill errors that he'll need to look at."
Clancee Pearce, who has earned an AFL recall for this week's clash with the Brisbane Lions, was Malaxos' player of the week after a best-on-ground performance in Swan Districts' draw with West Perth.
With defenders Michael Johnson and Roger Hayden still sidelined, Pearce will slot into a defensive role with Fremantle where Malaxos said his football smarts could be utilised.
"He reads the ball coming in and he gets in a pretty good position to intercept," Malaxos said.
"When the Swans get the ball he also makes pretty quick decisions to get in the right spot to receive.
"So he does read the play pretty well across there."
There were only seven Fremantle players in action in the WAFL this week, with seven of the club's first-year players earning selection at AFL level.
Josh Head was ruled out with a hamstring injury, while Ben Bucovaz, Chris Hall and Casey Sibosado were all sidelined with groin injuries that the club is treating with caution.
South Fremantle 17.16 (118) d East Perth11.5 (71)
Daniel Gilmore
He played quite well on a wing for South Fremantle and then at centre half-forward for a quarter. He finished with 22 possessions, which isn't as many as he has been getting, but he used the ball effectively, even in the wet, muddy conditions. He was just a bit more composed, which helped his effectiveness.
Hamish Shepheard
He played a variety of roles for East Perth from ruck to deep forward and then wing. He did some good things in all of those roles without playing a top game. His centre bounce hit-outs were very good, but around the ground he was pushed aside too easily. He played on Gilmore in the last quarter on the wing and they probably broke even. So he's pretty versatile.
Swan Districts 16.13 (109) drew with West Perth 16.13 (109)
Clancee Pearce
His first game for a few weeks and he was a pretty solid contributor for Swans with 24 possessions and seven marks. He started at half-forward and moved to half-back and used the ball pretty well. A couple of areas to work on are probably his spoiling and his tackling.
Michael Walters
He was pretty effective when he had the ball but he was a little bit inconsistent with his involvement, finishing with 12 possessions and a goal. He played onball, wing and forward and what he did with the ball was good, but he needs to work on a few other areas. Of his three positions he had the most impact when he was forward.
Adam Campbell
Played full-forward mainly, with a couple of spells in the ruck for West Perth when Mark Seaby went off. He worked quite hard without having a good game – he's just got to stick at it. Particularly early, Swans sent players back and he was out-numbered, so he was competing against numbers and finished with six possessions and three marks.
Jay van Berlo
First senior game for 2009 and he played pretty steadily. He played on Brett Robinson, who's one of the better onballers in the comp, in the second half and I thought he acquitted himself reasonably well in that role. He finished with 12 possessions from the 70 minutes he played.
Perth 16.15 (111) d East Fremantle 11.8 (74)
Chris Mayne (reserves)
He played 51 minutes, which was one minute more than planned. He played mainly onball with a couple of stints forward and went quite well. We had him down for 13 handballs and a one kick, so that was an interesting breakdown. But the handballs were often the right decision because he was always in tight. With that game time it isn't a bad result to have those possessions.
Peel 17.10 (112) lost to Claremont 20.11 (131)
No Fremantle players
