I think we have a lot of naturally big players in the pack who haven't needed to do a massive amount of weight training to bulk up. Even the likes of Fielden isn't as naturally big as these guys. Someone mentioned Andy Platt in the past but he also was a 2nd rower who gained a lot of weight from heavy weight training.
Mossop reminds me of Ian Roberts who some of the 'older posters' will remember but a lot better. Roberts was just a tackling machine.
It's similar to boxing for me - it's easier to fight at your natural weight rather than having to bulk up to make another weight.

20 years ago the Wigan pack lining up for the Challenge Cup final was Skerrett, Dermott, Platt, Betts, McGinty, Clarke with Cowie on the bench as the only forward sub. So no rotations, 5m offside line still in place and a winter season. I'd say this pack would have been pretty fit and mobile - more suited to 2012 instead of 1992. An all British pack with a strong Wigan born and / or raised contingent. Size wise, probably smaller than today as the current Wigan pack is massive.

The 10m offside, non competitive scrums plus the interchanges have changed the dynamic of the game from that time and probably resulted in the end of the traditional shaped front rowers from top flight rugby league.

. For the record, the back line that day was Lydon, Botica, Bell, Miles, Offiah, Edwards & Gregory. Imagine this lot on dry summer pitches!!

Given we did have a pack of O'Connor, Newton, Craig Smith, David Furner, Danny Tickle, Andy Farrell in 2003... I'd say our pack currently is leaner but more athletic.

This was probably the best Wigan side I ever saw. Gene Miles was unbelievable and even then he was at the end of his career.
I was watching some fights with Kelvin Skerrett on YT the other night - so funny!! God knows what the disciplinary today would think of him!!!!!

I remember standing next to Craig Murdock in a lift in the Galleries once, he looked tiny on the field but believe me he looked a big 'un in the flesh
Also 'bumped' into Inga as well...and i'm still here to tell the tale