Brad Lesley

Brad Lesley -- who fashioned a sports-movie career out of a few seasons in Major League bullpens -- died of a heart attack ... NOT kidney failure, as previously believed ... according to the death certificate obtained by TMZ. Leslie was 54 when he died in a Marina Del Rey hospital April 29, as TMZ…

Brad Lesley -- who played a few years of Major League Baseball before appearing in a slew of '90s sports movies -- passed away this weekend. He was 54. Lesley's ex-wife, Chiho Svimonoff, tells TMZ ... Lesley had been suffering from kidney problems and had been living in a nursing home for the past…