Aldrich was the No. 11 overall pick in the NBA draft in June before being traded from the New Orleans Hornets to the Thunder. He's the first of the four rookies acquired by Oklahoma City on draft night to sign his contract.
The team did not announce terms of his contract, but the NBA's rookie scale calls for Aldrich to make about $1.8 million in the first year of his contract and $1.9 million in the second year.
The third-year option on the deal would be worth about $2 million, with a fourth-year option at about $2.7 million.