Big Moss Birdie Path MB Golf Putting GreenBig Moss Birdie Path MB Golf Putting Green The Birdie Path MB is a training green we designed with Michael Breed to help build a repeatable & accurate putting stroke that is reliable under pressure. Colored lines have been integrated into the surface to aid set up, face angle, swing path, tempo, & targeting skills. Path & Cross help monitor the putter's path & face angle Target center, left edge, or right edge of cup using colored ball path lines