Isaiah Hartenstein missed the first month with a fractured hand — and now will miss at least a week with a calf strain. The Thunder are back to their small-ball era. The gap between Holmgren's injury and Hartenstein's return lasted over a week in Nov.

Although the Thunder have experience in using their small ball lineup, this matchup may prove to be a bit more difficult.

Oklahoma City Thunder center Isaiah Hartenstein is out at least a week with a calf issue and will be re-evaluated after that.

Thunder center Isaiah Hartenstein suffered a left calf strain Tuesday night against the 76ers and will be re-evaluated in about one week.

Oklahoma City Thunder center Isaiah Hartenstein will be re-evaluated in approximately one week after he suffered a left soleus strain against the Philadelphia 76ers Tuesday night,

But with Hartenstein, the Knicks were limited to offering a max of four years, $72.5 million. The Thunder gave up three years, $87 million. The reason for New York’s restrictions was it originally signed Hartenstein to a two-year deal, so operated with only his partial Bird Rights. Oklahoma City signed him using straight cap space.

Thunder center Isaiah Hartenstein will be reevaluated in approximately one week after suffering a left soleus strain.

The OKC Thunder will be without Isaiah Hartenstein in Thursday's matchup with the Cleveland Cavaliers, the team announced. He will be re-evaluated in approximately one week.

That advantage will only be more pronounced during their rematch on Thursday as Isaiah Hartenstein will not be able to play due to a left soleus strain. Chet Holmgren (hip) is ramping up for his return,