Thornton (Achilles) threw a 25-pitch bullpen session Saturday but still remains without a timetable for return, Dennis Lin of The San Diego Union-Tribune reports.

EDGE Analysis

Thornton's Achilles is said to be healing but still needs added time to heal completely. The left-hander intends to ramp up running activities within a week but manager Andy Green indicated that fielding practice will be an important benchmark to surpass before a return to the diamond becomes a legitimate possibility. The 39-year-old was placed on the 15-day DL on April 8.