College and amateur

Walker attended Francis Parker High School, and played for the Surf FC club team, before going on to play four years of college soccer at the University of California, Irvine. He was named to the All-Big West first team and led his team in goals as a junior in 2009, while as a senior in 2010 he was named to the NSCAA All-Far West Region first team and the All-Big West first-team, was the Big West Co-Offensive Player of the Year, and was voted as one of TopDrawerSoccer.com Top 20 Players to Watch. He finished his college career as UCI's all-time leader in games played with 85, scoring 27 goals in the process.

During his college years Walker also played with Orange County Blue Star in the USL Premier Development League,^[1] scoring 12 goals in 16 games for the team in 2010.

Professional

Walker was invited to the 2011 adidas Major League Soccer Combine,^[2] and was subsequently drafted with the 9th overall pick of the 2011 MLS Supplemental Draft by Chicago Fire, but was not offered a contract by the team.

He subsequently signed his first professional contract when he was signed by the NSC Minnesota Stars of the North American Soccer League. He made his professional debut on 7 May 2011, coming on as a substitute in a 1–1 tie with the Fort Lauderdale Strikers. Walker started his 2012 season with several strong performances.^[3]

International

In March 2009, Walker made an appearance for the Jamaica U-20 national team versus Canada in Fort Lauderdale, Florida. He is eligible to play for Jamaica through his Jamaican-born father.^[4]

NSC Minnesota Stars

• North American Soccer League Championship (1): 2011