STATE COLLEGE, Pa. -- Purdue (No. 10 ESPN/USA Today, No. 11 AP) relied on rebounding and scoring from role players with one half of its dynamic scoring duo having an off night.
Lewis Jackson added 17 points for the Boilermakers (14-1, 3-0), who won their ninth straight by getting scoring from other sources with Moore (2 of 10 shooting) finishing with just four points, 16 below his season average.
"They had a lot of guys collapsing on JaJuan tonight and especially E'Twaun," said Smith, who hit all five of his 3s. "I found some openings and got them to go."
Battle finished with 18 points, but shot just 6 of 22 from the field and was 2 of 9 from the 3-point arc. The Nittany Lions (8-6, 1-2), starting a stretch of five straight against ranked foes, lost its 10th straight to a Top 25 team.
But Purdue held a 46-31 edge in rebounding, including 14-6 on the offensive end. DeChellis knows what his team needs to work on in practice with Michigan State (No. 19 ESPN/USA Today, No. 18 AP) coming to State College on Saturday.
"I really believe it comes down to the glass, you have to go rebound the ball," he said. "You can't give them 14 offensive rebounds. ... We had so many balls bouncing around that we couldn't grab."
Kelsey Barlow's jumper at 12:50 of the second half capped a 16-8 run to push a four-point halftime lead to 47-35. Johnson scored 11 points in the half and hit two free throws to extend the lead to 15 with 8:52 left.
Even Johnson had an off-night offensively, finishing 5 of 9 from the field.
"If you had told me Johnson would have 15 [points] and Moore would have four, I would have thought we would have had a pretty good chance," DeChellis said.
But Buie's half brother, Battle, struggled to get open with Purdue guards Jackson, Barlow and Terone Johnson taking turns harassing the Nittany Lions' star. Jeff Brooks added 15 points and 10 rebounds for Penn State in a physical game.
"Yeah, but we expected that," Brooks said. "It's always like that when you play Purdue."
The Boilermakers took control early in the second half after leading 31-27 at the break. Johnson hit a fadeaway jumper in the post, then converted an offensive rebound with four Nittany Lions around him for a 40-31 lead.
After Andrew Jones missed a foul-line jumper, Jackson's fastbreak layup gave Purdue its first double-digit lead at 42-31 with 15 minutes left, and the Nittany Lions got no closer than seven the rest of the way.
Purdue coach Matt Painter credited role players Smith and Jackson with filling in offensively for Moore to help the team win its 10th straight road game.
"I was happy that other guys stepped up and played," he said. "I just thought Ryne Smith and Lewis were really in tune tonight, ready to go."
Maryland point guard Melo Trimble, considered a lock to leave the program before struggling in the second half last season, has withdrawn from the NBA draft and will return for his junior season.
Louisville's Chinanu Onuaku, who recently underwent a medical procedure to correct a heart rhythm issue detected during the combine, will keep his name in the NBA draft pool.
Andrew White III will return to the Nebraska men's basketball team next season after removing his name from the NBA draft.