We are now in the fantasy hoops version of March Madness, the month when most leagues have their playoffs and even their championship. As we've discussed in this space before, injured players on teams headed for the lottery are more likely to get "season-ending" designations that lead to opportunities for players off the bench to produce. Also, rookies and young players are getting more and more time for teams leaning into their youth movement. All told, you can set your squad up to succeed during the madness by keeping both eyes on your free agency wire to identify lightly rostered players that can make a difference down the stretch of the fantasy season.…