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.

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

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,

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.

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.

Twenty-one games into his tenure with Oklahoma City, Isaiah has adapted. Still, playing at Madison Square Garden for the first time since Hartenstein signed a three-year deal, $87 million contract with the Thunder, the venue Isaiah called home for two seasons, is unique.

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

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,