Bender (back) threw a 20-pitch bullpen session Sunday, Jordan McPherson of the Miami Herald reports.
Bender threw 15 pitches off a mound Thursday and slightly increased his pitch count during Sunday's throwing session. He apparently felt good afterward, as he's expected to throw in a simulated game soon. The right-hander doesn't yet have a timetable to rejoin the Marlins but has made good progress recently.