 Robertson was signed along with John Walker for £350 by Liverpool manager Tom Watson in March 1898.He made his debut in a Football League Division One against Sheffield Wednesday on 11 April 1898, scoring his first goal in the same match.The winger had a very successful time at Anfield missing just a single game in his first 2 seasons at the club, he even bagged a very respectable 19 goals, not bad for someone playing out on the flank.