Melbourne playmaker Cameron Munster says he's struggling to find his "zip" as his battle with osteitis pubis carries into a second NRL season.
The injury flared mid-season last year with Munster managing the condition, which causes inflammation around the centre of the pelvis, as Melbourne moved through to the finals.
The 28-year-old carried it into the World Cup and said he'd been unable to shake it during the break before resuming training in early January.
