Most important moment of the season: Arizona paved their way to a one seed in the NCAA tournament by paving their way through a solid non-conference schedule, headlined by two crucial non-conference road matchups against Duke (in Madison Square Garden) and Michigan in Ann Arbor. Arizona managed to pull away from the Blue Devils in the final minutes and then come back against the Wolverines, notching two of the biggest OOC wins by any of the major college basketball programs.
Most important moment of the season: UCLA didn't have too many signature wins going into the Pac-12 tournament (and a few too many questionable road losses), but may have played themselves into a four seed by whipping two fellow tournament teams in Stanford and Oregon before landing their biggest win of the season against Arizona and capturing a Pac-12 Tournament championship. Those victories might have been enough to propel UCLA to a favorable bracket with a four seed berth.
Most important moment of the season: Oregon seemed destined for the NCAA tournament with a 12-0 start before falling apart in Pac-12 play with eight losses in eleven games. But they rallied back for a crucial finish, winning eight straight games. Two of those wins came against UCLA (admittedly without Jordan Adams and Kyle Anderson) and Arizona on Senior Day, propelling them away from bubble danger and placing them firmly in the Dance.
Most important moment of the season: Colorado lost Spencer Dinwiddie and might have unravelled completely, but stayed steady through conference play and managed to finish in a huge tie for third in the Pac-12. They had solid wins against Arizona State and Oregon, but nothing will probably top the Askia Booker buzzer beater against Kansas that probably ensured their trip to March Madness.
Most important moment of the season: Arizona State was scrambling for important wins late in 2014, and they got them with wins against Oregon and particularly archrival Arizona. Additional home wins against Stanford, Colorado and Utah probably punched their ticket, but nothing will probably top the sweet victory over the Wildcats.
Stanford had some questionable results this season, but big wins over teams like UConn in non-conference play and UCLA in Pac-12 play (capped off by thumping Arizona State in Pac-12 Tournament play) provided them with just enough space to get over that bubble.