He is though. Marner scores at a career ~30 goal pace in the regular season, yet his goal scoring cuts in half in the playoffs. Against Columbus and Montreal he had 0 goals in back-to-back playoffs. His production in the second half of series (i.e. elimination games) is also putrid and falls off a cliff. In general, his game gets impacted the most between regular season vs playoffs, as teams play much tighter and there is less time and space to do things, plus the increased physicality which seems to rattle him.
This is even proven through data:
So another disappointing end to a Maple Leafs season comes with huge off-season questions. Justin Bourne looks at exactly why this year's group fell short again, and explores what it should mean for Auston Matthews, Mitch Marner, and more.
www.sportsnet.ca
Marner's shot distance suffers the most as he falls more to the perimeter vs the others.
On top of this, his stat line also gets boosted because he racks up points in early series blowout / high scoring games. In 2022, he had 8 pts in 7 games against Tampa, but 3 of those came in a 5-0 win in game 1, and in games 3-7 he only had 3 assists total. In 2023, he had 14 pts in 11 games, but 6 of those (including 2 of his 3 total goals) came in games 1 and 2 against Tampa where we lost 7-3 and won 7-2, and he had 1 goal and 7 assists in his remaining 9 games.
The others have been disappointing too, but it's the most painful for him IMO.