"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."