Soria, who underwent the elbow ligament reconstruction on April 3, is doing his rehabilitation work at the Royals' facility in Surprise, Ariz. He can begin throwing about October, and could possibly be ready to pitch a year from the surgery. The Royals are being extra cautious because this is Soria's second such surgery.
The Royals also face a decision on Soria's contract for 2013. The club holds an option on him for $8 million.
The Royals have three other pitchers recovering from Tommy John surgery this year. Reliever Blake Wood is rehabbing with Soria in Arizona. Starters Danny Duffy and Felipe Paulino are doing their work in Kansas City.