For the second consecutive game, Purdue didn't come out with a sense of urgency.
And it's put the Boilermakers in a tough spot again.
Michigan State shot 48 percent, including making seven of nine three-pointers, and No. 9 Purdue managed only 35 percent shooting as the Spartans took a 37-23 lead at halftime.
Purdue is coming off a loss at Iowa, which finished second-to-last in the Big Ten.
Kalin Lucas doesn't look hampered at all by a sprained ankle, scoring 18 points on 7 of 10 shooting. He's made all four of his three pointers and also has three assists.
JaJuan Johnson has 10 points on five of eight shooting for Purdue. E'Twaun Moore has four points and three assists.