The move quickly paid off for both parties as Hammington played the season as the Turbos first choice half-back, featuring in 10 of their games in a season which saw them finish top of the ITM Cup Championship log with 8 wins in 10 games and earn promotion to the Premiership for 2015 with a 32-24 win over Hawke's Bay in the championship final.
2016 didn't get much better, with the Turbos, now a championship side once more, finishing in 5th place on the log to miss out on the promotion playoffs altogether while Hammington had to make do with being part of a halfback rotation system along with Booth and the experienced Toby Morland, he played 6 times throughout the season, including 3 starts.
[2] During the 2015 Super Rugby season, Hammington was called into the Chiefs squad as an injury replacement due to the absence of Tawera Kerr-Barlow, Augustine Pulu and Leon Fukofuka.
This time, however, Hammington did manage to get on the field, debuting as a second-half replacement in the 53-10 demolition of the Force on 25 March and going on to make a total of 5 appearances throughout the year.
He would join fellow Manawatu Turbo Aaron Smith and young Otago halfback Josh Renton in competition for the number 9 jersey in Tony Brown's side.