The Ohio State wrestling team is on a roll.OSU continued their winning streak when they topped Penn State 24-9 Friday in State College, Pa., and then returned home to beat Indiana 28-11 yesterday.The Buckeyes have not only posted 13 consecutive wins, but are also ranked No. 9 in the nation and have a No. 1-ranked heavyweight, freshman Tommy Rowlands. Although they’ve been successful, head coach Russ Hellickson stresses the need for continued improvement. “We’re really controlling most of the matches, yet we’re letting a few get away,” he said.At 197 pounds, No. 5 Nick Preston defeated PSU’s Pete Mielnik 6-5, and IU’s Ty Matthews 6-4 to improve their record to 23-4 overall and 3-0 in the Big Ten.”I’m coming off an illness, so I’m not wrestling as well as I would like,” Preston said.No. 16 Keaton Anderson (149 pounds) sat out a week ago against North Carolina and Purdue because of the flu, but had a strong return, winning by decision over PSU’s Nate Wachter and dominating the Hoosiers’ Gabe Cook, 16-4.”He (Anderson) has been wrestling very strong,” Hellickson said.Anderson is now 19-1 overall and 3-0 in Big Ten play. His only loss came in November.Freshman John Clark (165 pounds) won 11-5 on Friday, but lost 13-11 in overtime Sunday.”He fights a lot,” Hellickson said of Clark. “He’s been looking pretty tough.” Against IU, Clark was on the verge of victory, up by a point at the end of the third period, but IU’s Kevin Stanley, ranked 12th in the country, received an extra point for having more than a minute of riding time (1:08). Earlier in the match, the scorer’s table had trouble with the clock, forcing the referee to reset the time. This may have cost the Bucks the eight seconds that gave Stanley the riding time point tying the match at 11-11, and ultimately leading to his victory.”The riding time may have made a difference.” Hellickson said.Rowlands won both of his weekend matches and is now 29-2 overall and 3-0 in the Big Ten. He travels to Lancaster Pa., today to compete in the National Wrestling Coaches Association All-Star Classic.The Buckeyes are in the heart of the Big Ten schedule and take on 10th-ranked Michigan State Friday.”Were just starting to get tough for the Big Ten and peak for the nationals,” Hellickson said.The Buckeyes will need that toughness coming up, as four of their five remaining opponents are ranked in the top 25-No. 3 Iowa, No. 5 Illinois, No. 7 Michigan and No. 10 Michigan State.