Former baseball pitching star Roger Clemens yesterday pleaded not guilty to six counts that he lied and obstructed a congressional investigation about whether he used banned substances to enhance his performance.


Clemens, 48, told Judge Reggie Walton “not guilty, your honor’’ during the hearing in a federal courtroom. He is accused of three counts of making false statements, two counts of perjury and one count of obstructing the U.S. Congress.


Walton set jury selection for April 5.


If convicted, Clemens, who won the Cy Young Award seven times as his league’s best pitcher, could face $1.5 million fines and up to 30 years in prison, although federal sentencing guidelines recommend up to 21 months.


In February 2008, Clemens denied using steroids and human growth hormones to the staff of the House of Representatives’ Committee on Oversight and Government Reform and again during a congressional hearing. He was under oath both times.