Jackson (forearm) completed a 10-pitch bullpen session Thursday, David O'Brien of The Athletic reports.

EDGE Analysis

The side session marks a step forward for Jackson after he missed a week of workouts at the start of camp due to forearm tightness, but manager Brian Snitker is still characterizing the right-hander as "day-to-day" as Opening Day nears. Atlanta hasn't yet ruled Jackson out from avoiding a trip to the injured list to begin the season, but he'll presumably need to advance to facing hitters within the next few days to have a shot at breaking camp as a member of the big club's bullpen.