He divulged the illness March 27.

The Thursday procedure was two days after he pitched the Diamondbacks to a 10-5 victory over the Los Angeles Dodgers.

"He couldn't wait to get out of the hospital," Dr. Bob Evani told The Arizona Republic. "There were no real surprises during the (four-hour) operation. It was pretty straight forward. The only complaints he had was a mild sore throat, which is expected."

The 32-year-old left-hander likely will be sidelined 4-6 weeks.

He will have to live without the thyroid and take hormones every day for the rest of his life.

He also will undergo a scan to determine how many, if any, cancer cells remain in his body after the surgery.