The Maple Leafs haven't decided that negotiations with players like Marner and Tavares will wait until after the season.
There's ongoing dialogue between the Leafs and the agents for these players, but it hasn't progressed to the point of exchanging official offers. It remains a process that's unfolding over time.
For Mitch Marner, if the timeline gets close to July 1, it might make sense for him to explore his options. Meanwhile, John Tavares is in a different position.
He clearly wants to stay in Toronto, but doesn't mean he'll do «for free».
His next contract will reflect his stage in his career and will look very different from Marner's next deal, no matter where Marner signs.
There's still a possibility these contracts could be finalized during the season, though there's no indication that anything is imminent.