 However, on July 30, 2015, Gaines would end up being promoted back as a full-time assistant coach for the Suns for the 2015-16 NBA season due to some changes with the coaching and player development staffs respectively.Gaines would also be considered a prime candidate for the interim coach tag for the Suns after head coach Jeff Hornacek was fired on February 1, 2016.However, after a generally awful season that was even worst then their 2012-13 season, Gaines would not have his contract renewed with the team.