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(AP) -- Louisville earned the top overall seed in the NCAA tournament Sunday, a process complicated by the topsy-turvy regular season and another round of weekend upsets.

The selection committee had its work cut out after five teams swapped the No. 1 ranking in The Associated Press rankings, capped by West Coast Conference champion Gonzaga (30-2) moving to the lead spot for the first time in school history.

But it was No. 4 Louisville (29-5) that got the overall top seed after sharing the Big East regular-season title, then pulling off a stunning comeback to beat Syracuse in the conference tournament final.

CBS is releasing the top seeds by region, but No. 2 Duke (27-5) already knows it won't get a No. 1 seed after losing in the Atlantic Coast Conference tournament.

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