Over the next six years, Warren would also travel many miles to call horse races. In 1988 he was recruited by the Nine Network to commentate on the 1988 Rugby League World Cup final and the 1989 state of origin series alongside Darrell Eastlake and Balmain Tigers coach Warren Ryan, 1989 Trans-Tasman test series alongside Darrell Eastlake again and Jack Gibson and to be part of its team to broadcast swimming at the 1990 Commonwealth Games with Norman May. The television rights for rugby league were bought by Nine for the 1991 State of Origin Series, 1992 season and onwards and he has been calling the game for them ever since. Warren has gradually overcome his fear of flying, though he does still have some fear as evidenced by a well publicised helicopter flight to a game on the Gold Coast in 2012 made necessary due to a delayed flight from Sydney to the Gold Coast. Overcoming his fear has seen him travel to New Zealand, the United Kingdom, Hong Kong, Japan and Canada for the network's swimming or rugby league coverage.