Walker graduated from Carson High School in Carson, California, where he set many receiving and return records,[citation needed] and was an All-American for the California Golden Bears, catching 86 passes for 2,206 yards and 22 touchdowns over the course of four seasons, an average of 25.7 yards per catch.

In the ninth week against Houston, he caught four passes for 111 yards, but he suffered a knee injury on a tackle by safety Mike Reinfeldt that knocked him out for the game and ultimately the rest of the year.

In his first playoff game as a receiver, facing the Buffalo Bills, he caught three passes for 24 yards in the 31–27 loss.

[13] He continued his ways in the Divisional Round versus Los Angeles, catching seven passes for 169 yards and a touchdown to opening the scoring in a 17–14 victory.

He played the same number of games the following year and caught 34 passes for 725 yards with five touchdowns while the Jets made the playoffs.

He separated his shoulder early against the Seattle Seahawks and ended up missing the rest of the season, having caught nine whole passes for 190 yards and one touchdown.

Legally blind in his left eye,[21] Walker eventually retired as an all-time leader for the Jets.

His older son, John, was a 3x All-American lacrosse player at The United States Military Academy at West Point.

Like many former NFL players, Walker has a variety of ailments as a direct result from his playing days, which he detailed in a revealing 2016 interview with Long Island Pulse Magazine.

[26] Walker was inducted into the Suffolk Sports Hall of Fame on Long Island in the Football Category with the Class of 2000.