SAN DIEGO (AP) — The East Region bracket is serving up two in-state rivalries on Sunday, one testy and complicated and the other one much less so. In a Hoosier State showdown, No. 2 seed Purdue (29-6) faces No. 10 Butler (21-13) in Detroit. In the nightcap to the entire round of 32, No. 5 seed West Virginia (25-10) renews its rivalry with No. 13 Marshall (25-10) far from the Mountain State, at San Diego State’s Viejas Arena. Marshall’s first-ever NCAA tourney win, an 81-75 thriller against No.