Grow your Be A Pro Character to 90+ Overall in Be a Pro mode.
Start up a career in Be a Pro, select your favourite team, start career in the NHL, and begin simulating. It’s a tedious process, but if you dismiss the weekly evaluations from the coach (you have the option to dismiss and never show again when the first one pops up) then all you have to do is press A when your player gets moved around in lines or leagues.
Your pro should gain +2 or 3 overall a year. I reached 90 overall in July of the 2025 season, so that’s about 10 seasons of simulating.