Pirates manager Derek Shelton said Wednesday that Jones experienced elbow discomfort during his most recent bullpen session and won't be able to make his final Grapefruit League start later this week, Noah Hiles of the Pittsburgh Post-Gazette reports.

EDGE Analysis

Shelton said that the Pirates will have internal conversations regarding when Jones will be able to make his first start of the season, but given that elbow discomfort can often foreshadow a more significant injury, the young right-hander would seem at high risk of landing on the injured list. Before a decision is made on Jones' next steps, the Pirates will presumably wait and see how his elbow responds to a few days of rest. If Jones is shelved to begin the season, the Pirates could open up a spot in the rotation for prospect Thomas Harrington, who wasn't expected to break camp with the big club but excelled in his first Grapefruit League start Tuesday.