 Walker was a second-team All-Southeastern Conference (SEC) selection after his senior season in 2002.In his four-year college career, he played in forty-seven games, started twenty-nine of them, and caught fifty-six passes for 716 yards and nine touchdowns.The San Francisco 49ers selected Walker in the fifth round (161st overall pick) of the 2003 NFL Draft, and he played for the 49ers in and .