COLUMBUS, Ohio (AP) -- Doylan Robinson was an unlikely hero for Ohio State.

After playing only 21 minutes in the previous 12 games, Robinson came off the end of the bench to play solid defense and score a career-high 10 points as Ohio State (No. 6 ESPN/USA Today, No. 5 AP) beat Penn State 88-75 Saturday.

	Ohio State's Michael Redd continued his mastery of Stephan Bekale and the Nittany Lions on Saturday.

"I didn't know I would get this much playing time," Robinson said.

Four Buckeyes scored more points, but it was Robinson's play that received the most praise after the game.

"He played huge for a guy who doesn't play a lot," said Michael Redd, who led the Buckeyes with 25 points.

Redd is accustomed to torturing Penn State, having averaged 26.8 points in his four previous games against the Nittany Lions. He had not shot better than 50 percent in nine of his previous 10 games, but made 9-of-17 shots and 7-of-10 free throws to match his season scoring high.

Yet Robinson, who led the Buckeyes with eight rebounds, still commanded a lot of attention.

"Doylan was the man," said Scoonie Penn, who had 17 points and seven rebounds for Ohio State (17-4, 8-2 Big Ten). "He got the big congratulations and the high-fives today. He was definitely the difference."

His play couldn't have come at a better time for the Buckeyes who assured themselves of having at least a share of first place in the conference going into their showdown at No. 6 Michigan State Wednesday.

Joe Crispin, who matched teammate Jarrett Stephens with 25 points, had 13 at halftime as the Nittany Lions (12-9, 4-6) held a 35-33 lead after leading by as many as seven points before Robinson started guarding Crispin.

"They did a good job of taking the 3 away from me," Crispin said. "He did a good job on me and the others did a good job of rotating over to help him."

Crispin wasn't a factor in the second half with the taller Robinson applying the pressure on defense.

He gave us a spark," Ohio State coach Jim O'Brien said. "It seemed he was bothering him a little."

Penn State coach Jerry Dunn said, "The first half we were consistent on offense and then in the second half, after we went through our first and second options, a lot of our shots didn't fall."

Meanwhile, Ohio State's offense perked up after an abysmal performance in Wednesday night's 67-64 upset loss at home to Iowa.

The Buckeyes shot 61 percent in the second half -- hitting 10 of their final 11 shots -- and finished at 56 percent, their best shooting performance in almost two months. They pulled away to lead by as many as 16.

Another substitute, sixth-man George Reese, scored 21 points on 7-of-10 shooting from the field and 7-of-8 from the line. Ken Johnson added 11 points and eight blocked shots.

The Nittany Lions lost their third straight. Crispin scored 29 points when Penn State upset the 10th-ranked Buckeyes 98-85 last year in the teams' final meeting.

Brandon Watkins' three-point play with 9:46 left gave Penn State a 58-54 lead, but Ohio State made its next seven shots from the field and 10 of 12 free throws during a 24-5 run, going ahead 78-63 with 3½ minutes left.

A Redd layup and a Reese turnaround tied the score. After Johnson blocked a shot by Stephens, Reese scored off a fastbreak assist from Penn, giving the Buckeyes the lead for good.

Titus Ivory and Crispin missed 3-pointers for the Nittany Lions while Johnson, then Redd each made a pair of free throws to cap a 10-0 run. The Buckeyes finished 24 of 29 at the line, a marked difference from Wednesday night's loss when they were 14 of 27.