Center Isaiah Hartenstein has been diagnosed with a right soleus strain and will be reevaluated in 10-14 days, the Thunder announced (via Twitter). An examination was done after Hartenstein missed Friday’s game against Phoenix because of soreness in his right ankle.
After injuries limited him to 57 games last year, Hartenstein has been a rock in the middle for Oklahoma City this season, appearing in the first 19 games. He’s played an important role in helping the Thunder build the league’s best record, averaging 12.2 points, 10.7 rebounds, 3.4 assists and 1.3 steals in 27.8 minutes per night while shooting 67.1% from the field.
Hartenstein’s injury is the latest significant one for the Thunder, who haven’t been able to field a full lineup yet despite their 19-1 record. Jalen Williams, one of the heroes of the NBA Finals, didn’t make his season debut until Friday, while Chet Holmgren, Luguentz Dort, Alex Caruso, Kenrich Williams, Isaiah Joe and Aaron Wiggins have all missed multiple games with various ailments.
Holmgren was used as the starting center on Friday as OKC employed a smaller starting five with Williams returning. Reserve big man Jaylin Williams played 21 minutes, and he’ll likely have an expanded role until Hartenstein resumes playing.
Hartenstein suffered a left soleus strain in January and missed five games last season, according to Justin Martinez of The Oklahoman (Twitter link).
After playing for five teams in his first six NBA seasons, Hartenstein turned out to be a valuable addition for the Thunder when he signed as a free agent in the summer of 2024. That deal includes a $28.5MM team option for next season, which could lead to a difficult decision as Oklahoma City tries to remain at a championship level without going into the second apron.