Ben Margot / AP

San Francisco's Barry Bonds watches the flight of his 750th career home run off Arizona's Livan Hernandez in the eighth inning Friday. The blast puts Bonds within six of breaking Hank Aaron's all-time home run record.

updated 2:37 a.m. ET June 30, 2007

SAN FRANCISCO - Barry Bonds is going to have a harder time enjoying his home runs if the Giants keep losing close games.

Bonds hit his 750th career home run, an inning after getting a startling hug from a fan in a 4-3, 10-inning loss to Arizona on Friday night. The homer pulled the San Francisco slugger within five of tying Hank Aaron’s record, but Miguel Montero hit a solo homer off Brad Hennessey (1-3) in the 10th for the Diamondbacks and San Francisco lost its third straight.

“Everybody in that clubhouse knows he’s going to get a lot of attention reaching this milestone, as he should,” Giants manger Bruce Bochy said. “It’s going to be a big moment in baseball. Right now, we’re all embarrassed with where we’re at, how we’re playing, things that are happening on the field.”

Tony Pena (3-1) pitched a perfect ninth and Jose Valverde finished for his 26th save in 29 chances. Valverde got Bonds to ground out to first to end it.

The 42-year-old Bonds led off the eighth inning with a solo shot off D-backs starter Livan Hernandez to tie the game at 3. Watching the ball sail over the wall in right-center, he lowered his head and began his trot. The main center-field scoreboard immediately featured a road sign reading “Bonds 750” in the middle and “Road to History” on either side.

The home run came an inning after a fan gave everybody a scare when he hopped the fence and ran out to Bonds in left field. The seven-time NL MVP calmly greeted the man and walked him off and into the custody of security personnel.

The fan came out over the short fence along the left-field line and scurried to Bonds while Orlando Hudson was batting. Bonds didn’t flinch, putting his arm around the man and walking him off the field — and fans began chants of “Barry! Barry!”

“He just wanted to shake my hand,” Bonds told MLB.com while quickly leaving the ballpark. “I told him to come with me so he didn’t get into any more trouble.”

The Giants said the man, in the custody of San Francisco police, would face charges of public drunkenness and interfering with a sporting event. His name and age were not immediately available.

Bochy credited Bonds for not panicking.

“My first feeling was fear,” said center fielder Dave Roberts, who began to move toward Bonds. “Barry handled it like a pro. I’m glad the situation was diffused.”

Bonds drove a 3-2 pitch an estimated 380 feet for his 16th home run of the season and first in exactly a week since connecting off Yankees reliever Scott Proctor on June 22. It was Bonds’ first homer in 14 at-bats and 23 plate appearances — and the fourth of his career against former Giant Hernandez, who last surrendered a home run to Bonds on Aug. 24, 2006. It was Bonds’ 39th against Arizona.

Bonds also had an RBI single in the first, drew his 79th walk in the third and popped out in the sixth.

He received a standing ovation when he walked to left field in the top of the ninth, tipping his hat to the crowd. Bonds’ batboy son, Nikolai, is nursing an ankle injury and wasn’t at home plate to greet him with a hug as is their typical routine.

“I tried to throw the pitch down,” Hernandez said. “It was low, but Barry is a great hitter. He went down and lifted it over.”

Roberts dropped a routine fly ball in center while on the run, committing a two-base error in the seventh that scored two runs to give the Diamondbacks a 3-2 lead. It also cost Matt Morris the victory.

“I drop a a routine fly ball to cost us the game,” Roberts said. “It’s ridiculous. It just can’t happen.”