Junior Walker was in the thick of Motown's mid-'60s explosion, blowing sax solos on countless records and leading his own band into the spotlight. A great tenor saxophonist, Walker was the man behind the vein-popping "Shotgun" -- a track that'll still make your speakers sweat when you play it. Though Walker's career waned by the beginning of the '70s, he's left an indelible mark on popular music.