"We knew the potential was there for this," A's manager Bob Melvin said. "Unfortunately he had a couple different opinions but they all came up the same, that ne needed to have the surgery, so it's going to be a while."
Triggs was originally placed on the disabled list June 10 with a strained hip, his last start coming the day prior against Tampa Bay. He allowed a combined 20 earned runs in his final four starts, after holding opponents to 11 earned runs total in his first eight starts. Seven times in 12 starts overall, he yielded one earned run or fewer.