Jeffress suffered a minor hamstring strain and will be backed off from throwing bullpens for a while, Tom Haudricourt of the Milwaukee Journal Sentinel reports.

EDGE Analysis

From the way it sounds, the injury is not overly serious. However, if it does linger throughout camp, it could affect his chances of garnering the closer role for Milwaukee. Jeffress is currently competing with Will Smith for the job, so this situation with his hamstring is worth monitoring as spring training goes on.