What is Knicks’ actual plan for Isaiah Roby?

Mandatory Credit: Vincent Carchietta-USA TODAY SportsObi Tobbin is an Indiana Pacer. Julius Randle remains in New York. And the Knicks’ plan to back him up seems to be … Isaiah Roby?

The former second-round pick signed a two-year deal with the Knicks in April and has joined the team in Las Vegas for the annual NBA Summer League. He averaged 8.3 points and 5.3 rebounds in those three games and shot 44% from the field. Not at all bad for an expected backup power forward.

Except it’s summer league. The 25-year-old Roby isn’t playing against All-Stars or even former stars on the back nine of their career. He’s matched up with largely rookies, second-year players, and depth guys. This isn’t the…