By Patrick Andres The year was 2000. The Los Angeles Lakers were the NBA’s reigning champions and The Marshall Mathers LP ruled the radio. Into this climate, Philadelphia 76ers guard Allen Iverson—fresh off his first All-Star season—decided to release a rap album. Big mistake. “I remember when I did that terrible rap song,” Iverson told Rachel Nichols in Thursday’s episode of Headliners on Showtime. “Awful. That’s one of the things, today, I’m so embarrassed every time we go somewhere and people play it.” The first single—”40 Bars”—made it to the airwaves, and it received widespread criticism …