Cornes reached his 250th game in Round 5 of 2013, where Port Adelaide came from 41-points down to win 12.12 (84) to 10.19 (79) at AAMI Stadium against the West Coast Eagles, taking the Power to a 5–0 start to the season. Shortly after, Cornes passed Warren Tredrea's record of 258 games to become the man who has played the most games for Port Adelaide in the AFL, in a match where Port thrashed Greater Western Sydney at Skoda Stadium, 19.11 (125) to 6.14 (50). Cornes has played a vital role under Ken Hinkley in reinventing Port Adelaide and getting the team back into finals in 2013, and helping the Power to their best ever start to an AFL season in 2014, starting 10–1, before eventually losing the 2014 preliminary final to Hawthorn, the eventual premiers, by three points.