By Mark Lamport-Stokes PACIFIC PALISADES, California, Feb 16 (Reuters) - American Charlie Beljan had the time of his life at the Northern Trust Open on Saturday, outscoring his playing partners Phil Mickelson and Ernie Els before getting both men to sign his cap. Just three months after winning his maiden PGA Tour title despite suffering a panic attack midway through the tournament, Beljan enjoyed an adrenaline-filled day in dazzling sunshine at Riviera Country Club in the company of two Hall of Famers.