Millar joined the Red Sox organization in 2003 and had a career year. He had another great season in 2004, hitting .297 with a .383 on-base percentage, 18 homers and 74 RBIs. Millar started the "Cowboy Up" phrase and proclaimed the '04 Sox "idiots." It worked, and the fans loved him. Millar serves as an analyst for MLB Network and NESN.