The baseball Buckeyes have come from out of nowhere to win the Big Ten Tournament Championship. The #6 seed (the lowest seed) Buckeyes went undefeated in the double elimination tourney. They beat Penn State, Michigan, and then Minnesota twice, once on Saturday, and again today 4-2 in the championship game.
That means that for 2006-2007 Ohio State sports won the following Big Ten titles:
men's basketball (reg season and tourney)
women's basketball (reg season)
softball (reg season and tourney)
field hockey (reg season)