I heard a stat that Marner in games 5-7 over the past few years has just 7 points (0G, 7A) in 20 games. That is almost unplayable in those situations. Maybe it's a function of the synergy between the rest of their "core 4", but that is a big, big red flag. He's a terrific regular season player, but he totally disappears when the pressure gets ratcheted up.