Nick Menza, who played on many of Megadeth’s most successful albums, died after he collapsed on stage during a show. He was 51. Menza was into the third song with his new band Ohm when he collapsed late Saturday night, said Ohm’s manager Steve Bauer. Paramedics couldn’t revive him. The band was playing at The Baked Potato, in Studio City, California. “The group’s bassist texted me last night after it happened,” Bauer told CNN. “We are all still in shock.” Officials haven’t released a cause of death. Alongside Metallica, Slayer and Anthrax, Megadeth makes up metal’s “Big Four.” And for...