When Yao Ming first entered the NBA, Rockets general manager Dawson found him very flexible, with extraordinary flexibility among 7-foot-long people. He thought he must be a building block.

So Dawson not only personally pointed out Yao Ming's steps, but also invited many teachers. They are all stars in the league. One of them is a 7-foot-tall uncle who mainly teaches Yao Ming indoor footwork and jump shot techniques. This elder is very famous. His name is Jack Sigma.

In today's alliance, there is a technology named "Sigma Barker" because the elderly refuse to learn. Yao Ming practiced the six-stride in his early career. These six mysterious steps are actually a technical action to introduce insiders. This technology looks simple. This is the footwork of changing the face frame under the basket, that is, putting the ball behind the baseline, then suddenly withdrawing with one foot, protecting the ball with both hands, and turning to the face frame from the back basket. When the defender is distracted, a receiver jumps on the opponent, attacks the basket directly, or points at the opponent. Defense, straight back jump shot.

Patrick Ewing's special skill "Rabbit Jump" actually evolved from the horse-riding step. We carefully observed Yao Ming's simplest catch, and then turned to jump shot, which is the standard "horse action". This Sigma step is also the predecessor of McHale's "step" and Olajuwon's "dream step"

The so-called "Jack-Jumper" refers to changing from the back basket to the front basket, taking a step towards the defender with unsupported feet, creating space, and then pulling up the jumper. The founder of the center's signature action is Jack Sikma. In the 1970s, Sima's offensive skill under the basket was the best among NBA centers.

Sigma not only attacked well, but also won the most rebounds in supersonic history. At the same time, no one can beat him in the free throw percentage. He is also the second in supersonic history and the third in total score. Sigma No.43 jersey retired at supersonic speed on 1992. Besides Bill Walton, he is regarded as the best white center in NBA history. On April 30th, Jack Sigma officially announced his retirement. His number 43 jersey was retired by the Sonics as a souvenir. He is still the historical revival of supersonic speed. On 20 16 12, Jack Sikma was nominated as a basketball hall of fame candidate on 20 17.