David Blatt has joined the Knicks as a basketball operations consultant, the club announced Wednesday. Blatt, the former head coach of the Cleveland Cavaliers, was one of the finalists for the Knicks’ head-coaching vacancies in 2016 and 2018. Those jobs ultimately went to Jeff Hornacek and David Fizdale, respectively. Blatt has retired from coaching and is expected to consult with the Knicks’ front office in scouting and player evaluation for the NBA club and the Westchester Knicks, the franchise’s G League team.