Selection committee chairman Keith Gill revealed that Iowa State edged out UConn and Houston for the final 1-seed spot.
Gill cited Iowa State's head-to-head win against Houston and UConn's stronger three best wins as the deciding factors.
Michigan, Duke, Arizona, Iowa State Earn 1-seeds in March Madness Preliminary Rankings
Michigan secured the No. 1 overall seed in the preliminary March Madness rankings, joining Duke, Arizona, and Iowa State as the top four teams.