Martinez (elbow) tossed a bullpen session Friday, Nick Piecoro of The Arizona Republic reports.
This was Martinez's first time throwing off a mound since he underwent Tommy John surgery on his right elbow last July. Per Piecoro, the reliever was at 96-to-99 mph with his fastball during the bullpen session. Martinez still has several more hurdles to clear in his rehab program, and he's not expected to be ready to return to Arizona's bullpen until sometime after the All-Star break.