The No. 1 seeds, Miami’s fate, Pac-12 legacy woes, injury issues and mid-major math

After a riveting regular season and fortnight of conference tournaments, Selection Sunday takes center stage with 68 seeds and 32 first-round matchups in the balance — for what might be the final time. College basketball’s power brokers are mulling whether to expand March Madness to 76 teams, a move that would substantially lower the threshold for inclusion and alter the dynamics of the opening week. Instead of the First Four, the tournament would begin with a First 12. Executives must commit to expansion this spring in order to implement the change for next season, according to NCAA president Charlie Baker, who supports the move. “From my point of view, the more teams we can get into the...