The problem was Brad Adcock of Michigan was matching him pitch for pitch.
Threw five innings, neither pitcher had allowed a hit and both had only surrendered a pair of walks. In the sixth, both teams picked up their first hit but both pitchers held the offense scoreless for another frame.
And then Indiana broke it open in the top of the seventh.
Top-seeded IU erupted for five runs and five hits in the seventh and went on to beat No. 5 Michigan 5-0 at TD Ameritrade Park in Omaha, Neb.
The Hoosiers (40-13) will now get Friday off before playing the winner of Friday's Illinois-Michigan State game at 2 p.m. ET Saturday. If IU wins that game, it will advance to Sunday's championship game. If the Hoosiers lose the early game on Saturday, it would come back and play the same team one more time Saturday night.
The victory was the 600th in Tracy Smith's coaching career.
Morris, the sophomore right-hander from Archer, Fla., went seven scoreless innings to record the victory. He only allowed one hit and threw 90 pitches. Scott Effross came on for a scoreless eighth and Jake Kelzer got the Wolverines out in order in the ninth.
DeMuth opened the seventh with a hit to left-center but when Michigan took its time fielding the ball, an aggressive DeMuth took second for a double. It was similar to Casey Rodrigue's double Wednesday against Iowa.
Brad Hartong lifted a fly ball to right field to move DeMuth to third. Will Nolden then hit a hard come backer to the pitcher and Adcock couldn't field it with DeMuth scoring the game's first run. Nolden was safe at first and the play was ruled a hit.
Nick Ramos then reached first on an infield hit to put runners on first and third. After Tim O'Conner struck out, IU did some more damage from the top of the order.
Rodrigue got two runs home with his second triple of the tournament and sixth on the season. Then, on a 3-2 pitch, Kyle Schwarber crushed an offering into the seats over the right field fence and the Hoosiers led 5-0. It was Schwarber's 11th home run of the season and snapped an 0-for-6 slump for the series.
If Indiana can win a game on Saturday the Hoosiers would advance to Sunday's Big Ten title game at 2 p.m. ET. All of Indiana's games on Saturday or Sunday will be televised on the BTN.
Follow Terry Hutchens at Twitter.com/Foxsportshutch