High above the field in a private box, baseball commissioner Bud Selig was a reluctant witness to history. Choosing to overlook the steroid allegations that have dogged the San Francisco slugger, Selig watched Bonds tie Hank Aaron's home run record — his mouth agape, hands stuffed in pockets and nary a cheer on his lips.

No. 755 was a strong shot for all the doubters, an opposite-field drive of 382 feet to left-center, moving Bonds within one swing of having baseball's pinnacle of power all to himself. It came on a 2-1, 91 mph fastball.

And it was a long time coming.

It had been eight days and 28 plate appearances since Bonds hit his 754th home run, and he came out for early batting practice today, hoping to break his slump. He did it quickly, leading off the second inning.

"No matter what anybody thinks of the controversy surrounding this event, Mr. Bonds' achievement is noteworthy and remarkable," Selig said in a statement.

Selig said either he or a representative would attend the Giants' next few games "out of respect for the tradition of the game, the magnitude of the record and the fact that all citizens in this country are innocent until proven guilty."

Bonds drew a mixed reaction from the crowd at Petco Park after he homered off Clay Hensley today. Several fans held up asterisk signs and the San Francisco slugger was booed as he headed to left field at the end of the inning.

Bonds walked his next three times up and left the game in the eighth for a pinch-runner. He raised his helmet with his left hand, then his right, and drew a standing ovation from Giants fans who chanted his name.

He's not expected to start Sunday, which would give him a chance to break the record at home starting Monday night.

Bonds hit the tying homer off a former Giants draft pick who was suspended in 2005 for violating baseball's minor league steroids policy.

Earlier in the day, Alex Rodriguez hit his 500th home run and spoke with Selig, who reportedly has not spoken with Bonds in several years.

Bonds had been closely monitoring A-Rod's quest in the past week — like Bonds, Rodriguez took advantage of his first opportunity of the game, connecting at Yankee Stadium.

Bonds' milestone shot clunked off an advertising sign on the facade and fell into the navy blue bleachers below — right under the main scoreboard featuring a giant photo of the smiling slugger.

A fan sitting in that area threw back a ball onto the field, but that was not the historic one. Instead, the prized souvenir wound up in the hands of 33-year-old Adam Hughes of La Jolla, and he was whisked to a secure area so the specially marked ball could be authenticated.

Bonds walked a half-dozen steps after connecting, clapped his hands and rounded the bases with no hint of a smile.

After Bonds crossed the plate, he lifted his batboy son, Nikolai, and carried him several steps in an embrace.

The 43-year-old star got a hug from teammate Ryan Klesko, and Bonds slowly walked through a greeting line of other Giants. Moments later, he walked over to the field-level seats and kissed 8-year-old daughter Aisha and wife, Liz, through the screen.

Bonds then lifted his cap before going to the far end of the dugout and hugging Sue Burns, the wife of late Giants ownership partner Harmon Burns.

Only two other major league games were being played when Bonds connected. The news was met with scattered boos at Dodger Stadium and Seattle.

The godson of Willie Mays and the son of an All-Star outfielder, Bonds seemed destined for greatness from the start. Funny thing, his speed drew a lot more attention than his strength when he broke into the majors as a lanky leadoff hitter.

Even when Bonds became a threat to Aaron's record, many fans thought age would slow him down. Instead, his power numbers surged — as did speculation about steroid use.

Bonds steadfastly denied that he knowingly used performance-enhancing drugs and let the allegations bounce off him, the same way fastballs deflected off his bulky body armor.

Choking up an inch or so on his favorite maple bats, No. 25 became the No. 1 target for boobirds outside the Bay Area. He has remained beloved back home through all of the off-field issues, refusals to sign autographs and his own surly behavior.

Bonds was constantly shadowed by doubts rather than showered in affection the way Mark McGwire was nearly a decade ago.

The whole baseball world — the whole country, really — joined the celebration when McGwire broke Roger Maris' season home run record in 1998. After Big Mac launched No. 62, he pointed to heaven, hoisted his son and hugged Sammy Sosa.

Yet that story did not have a happy ending. Disgraced by a poor performance in front of a congressional panel looking into steroids, McGwire basically became a recluse and never came close in his first bid to make the Hall of Fame.

Bonds broke McGwire's mark of 70, hitting 73 homers in 2001. Ever since, he's been on a path toward Aaron, a journey that hasn't been full of joy. Bonds has been hobbled by bad knees and bickered with Giants management, and his chase was hardly backed by Selig.

The commissioner is a close friend of Aaron's, who began and ended his career in Selig's native Milwaukee.

A lot of fans, in fact, are already rooting for the day when Bonds' record falls. While Sosa, Ken Griffey Jr. and Frank Thomas are next up among active players, Rodriguez is considered the most likely successor. The Yankees star just turned 32 and is well ahead of Bonds' pace at the same age.

That said, Bonds' quest was the main reason Giants owner Peter Magowan brought Bonds back for a 15th season in San Francisco, signing the slugger to a $15.8 million, one-year contract right before spring training.

Even with Bonds at 755, there is bound to be a split among many fans over who is the real home run champ.

There will be some who always consider Babe Ruth as the best — those old films of him wearing a crown will last forever. Others will give that honor to Aaron, as much for his slugging as his quiet dignity in breaking Ruth's record in 1974.

While steroids tinged Bonds' chase, race was the predominant issue when Aaron took aim at Ruth's mark of 714.