What does it mean when someone commits before or during junior year?

Right. Women’s volleyball, baseball, men’s basketball, and men’s lacrosse (the sports mentioned here) all now have no-direct-contact rules from a coach to a player until the summer after sophomore year (dates vary by sport, but are between June and September). All of these sports have had a history of aggressive recruiting tactics and early commitments. Now, there is still a ton of background scouting and roundabout conversations going on, and college coaches are seeing these athletes play much earlier, but the actual discussion and commitment process cannot start until that summer.

(Largely by coincidence, I do know three baseball recruits to Stanford who both committed early freshman year or earlier - all before these rules were in place - and all commitments worked out for everyone involved. I’m still happy to see the rules, though.)