Carson, Calif. ? Maurice Greene is focused on running under 10 seconds in 60 100-meter races.

“Sixty is like a milestone,” he said. “Especially in baseball, 60 home runs is a big figure. Somebody scores 60 in a basketball game, that’s a big thing.”

Greene, a Kansas City, Kan., native, says he’s four short of his goal. He’ll resume his pursuit today in the Adidas Track Classic, where he twice has won the 100 in sub-10-second times.

The meet featuring several Olympic medalists is a preview of the U.S. championships, to be held June 23-26 at Home Depot Stadium.

Greene won the inaugural meet in 9.94 seconds in 2003 and repeated last year with a wind-aided time of 9.86. Afterward, hurdler Larry Wade came on the track and doused Greene’s shoes with a fire extinguisher in a prearranged stunt.

“I’m capable of going under 10 seconds any time I step on the track,” he said. “The only thing I worry about at Home Depot is whether it’s going to be a legal race. The wind swirls out there.”

Greene ran 10.03 – fastest in the world this year – to win the 100 at a meet April 30 in Martinique.

“I’m on schedule,” he said. “My training has been going great. I put in a lot of work after the indoor season, worked three times as hard as I usually do. I’m where I want to be.”

Greene will take on Olympic gold medalist Justin Gatlin, Leonard Scott, Coby Miller, Bernard Williams and John Capel, who defeated Greene in the 100 at the Kansas Relays. Greene finished third in Athens.

Greene’s goal of 60 is personal, but he figures it helps a sport mired in the BALCO scandal and frequent doping violations.

“If you go out there and put on great performances and have great competition, that will do enough,” he said.

Greene trains in Los Angeles, and he likes the atmosphere in Carson.

“A lot of people in L.A. come out to see me compete, and I have to put on a great show for them,” he said.

“That’s what drives me.”

The marquee race of the meet could be the 400, where Olympic gold medalist Jeremy Wariner, silver medalist Otis Harris and bronze medalist Derrick Brew will line up.

Also expected are Andrew Rock, a member of the gold-medal-winning 1,600 relay at the Athens Olympics, and LaShawn Merritt.

Merritt won the 400 in 44.66 at a meet May 14 in Jamaica. His time was the fastest outdoors this year.