In 1983, coinciding with the arrival of Chuck Knox as head coach, the uniforms were updated slightly. The striping on the arms now incorporated the Seahawks logo, and the TV numbers moved onto the shoulders. Helmet facemasks changed from gray to blue. Also, the socks went solid blue at the top, and white on bottom. In the 1985 season, the team wore 10th Anniversary patches on the right side of their pants. It had the Seahawks logo streaking through the number 10. Starting in the 1989 NFL season, jerseys were no longer sand-knit. In 1994, the year of the NFL's 75th Anniversary, the Seahawks changed the style of their numbering to something more suitable for the team; Pro Block from then until 2001. That same year, the Seahawks wore a vintage jersey for select games resembling the 1976–82 uniforms. However the helmet facemasks remained blue. The logos also became sewn on instead of being screen-printed. In 2000, Shaun Alexander's rookie year and Cortez Kennedy's last, the Seattle Seahawks celebrated their 25th Anniversary; the logo was worn on the upper left chest of the jersey. In 2001, the Seahawks switched to the new Reebok uniform system still in their current uniforms, but it would be their last in this uniform after the season ended. Previously, the team's uniforms were made by Wilson, Wilson/Staff, Russell Athletics, Logo Athletics, and Puma.