Martin retired from the NBA on Thursday, Yahoo! Sports reports. The first overall pick in the 2001 NBA Draft has turned in a mere 61 appearances over the last three seasons, so his decision doesn't come as a shock. After stints with five organizations, Martin will conclude his career with averages of 12.3 points (on 48 percent shooting), 6.8 rebounds, 1.9 assists, 1.2 steals, and 1.1 blocks in 31 minutes.