Commissioner Bud Selig announced Saturday that he is making a push for stricter punishments in the joint drug-testing program between Major League Baseball and the players' association.

Selig cited last season's suspension of Melky Cabrera and the recent report of players allegedly seeking performance-enhancing substances through the Biogenesis facility in South Florida as evidence that tougher punishments are needed.

This development comes on the heels of the joint announcement in January that MLB would become the first professional sports league to blood test randomly for human growth hormone during the regular season.

"I have been interested in stiffer penalties for some time," Selig said.

"We've made meaningful adjustments to our testing, and it is time to make meaningful adjustments to our penalties."

Selig said there were only five positive tests of the more than 5,000 conducted last season.

The new penalties are intended to deter the small number of those who still don't see the current ones as harsh enough.

"I don't know if we can ever get to zero; there will always be somebody out there," Selig said. "For a very small percentage of people it hasn't served for as much of a deterrent as I think it should."