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8/4/2013 2:17 P.M. ET

Bochy has confidence in Machi despite hiccup

ST. PETERSBURG -- About 12 hours after the Giants' 2-1, 10-inning loss Saturday night to the Tampa Bay Rays, manager Bruce Bochy was still nonplussed over reliever Jean Machi's unusually poor control.

With the score tied, 1-1, Machi walked the bases loaded in the 10th before Wil Myers lined a walk-off single. Entering Saturday, Machi had walked only five batters in 34 innings.

"He was just flying open and couldn't get back on track," Bochy said Sunday, referring to a flaw in Machi's delivery that caused his front shoulder to turn too quickly.

Though Machi has thrived at times this year, opponents are batting .366 (15-for-41) off him with runners in scoring position. He has allowed eight of 23 inherited runners to score -- a 34.8 percentage that is the highest among Giants relievers.

Bochy maintained faith in Machi. "I'm a Machi guy," he said. "He's got great equipment, he throws three different pitches and he fields his position well."

Giants mulling another rehab start for Vogelsong

ST. PETERSBURG -- Ryan Vogelsong's injury rehabilitation start Sunday for Double-A Richmond against New Hampshire was expected to be his last tuneup before rejoining the Giants' rotation.

That might not be the case.

Giants manager Bruce Bochy indicated Sunday that Vogelsong could make one more Minor League start, possibly next Friday for Triple-A Fresno at Iowa.

"The plan was to give him one more start," Bochy said before the Giants' series finale against Tampa Bay, revealing a plan that hadn't been widely circulated. "But that doesn't mean we can't deviate from that."

Admitting that it sounded paradoxical, Bochy said that he wanted Vogelsong to experience adversity -- for instance, pitching with runners on base -- to acclimate him to conditions he'll face in a Major League game.

Though the injury that sidelined Vogelsong resulted from an accident, a pitch thrown by Washington's Craig Stammen that fractured his throwing hand in a May 20 game, Bochy cited the World Baseball Classic as a possible source of the right-hander's struggles. Even after throwing five shutout innings in the game when he was injured, Vogelsong's ERA was an inflated 7.19.

"The question with the WBC is going to come up, because he did crank it up early," Bochy said, referring to the extra work Vogelsong engaged in to become Team USA's No. 2 starter. "Whether it took a toll on him, you don't know."

Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.