The steady, months-long grind of the college basketball season has crescendoed to one of the most memorable moments of the month of March each year: Selection Sunday.  Yes, that's right — bracket day is officially here.

After weeks of anticipation and speculation, the bracket-filling finally can begin Sunday as the 68-team fields for the NCAA men's and women's basketball tournaments are revealed. "Selection Sunday" will unveil which teams made the March Madness tournaments (and which "bubble" teams were left disappointed) that will unfold over the course of four regionals to will determine the Final Four national semifinals.

March Madness. And as college basketball fans prepare for the highs, lows, upsets and general mayhem of the annual NCAA basketball tournament, fans across the country will open their phones to place bets on their favorite teams.