PHOENIX -- Right-hander Aaron Heilman had a positive bullpen session prior to Sunday's game and could be one more sideline exercise away from being activated to rejoin the D-backs' bullpen.
Heilman went on the disabled list on April 15 with tendinitis in his right shoulder.
"He looked good, was throwing free and easy," manager Kirk Gibson said. "Maybe he'll do another simulated game. But I could tell he's feeling better, stronger. He had good movement on the ball."
Heilman has won his only decision and has a misleading 12.15 ERA. He had an effective start to his season, but allowed six earned runs in 1 2/3 innings in his last appearance prior to going on the DL.
Gibson didn't seem to think Heilman, who last saw action on April 13, would need any rehab outings before rejoining the fray, which would hasten his return. It would also accelerate the roster decision Gibson will have to make to create room for the veteran reliever.
The manager shrugged. "You have to make [those decisions]. It's a good problem to have," Gibson said.