If there is a center on the trade block that the Celtics need to go after, it's Clint Capela. The Celtics have many reasons why they want to add Capela to the roster.
Adding Nikola's playmaking skills and ability to stretch the floor can be crucial for Jayson Tatum and Jaylen Brown's development. Both Tatum and Brown can benefit more from a playmaking center who can get them open shots like Horford would more than adding another high-scoring guard.
This upcoming offseason is shaping up to be one of the craziest we've seen in recent history. For the Boston Celtics, anything is on the table, and even co-owner Wyc Grousbeck stated that "this is the most uncertain offseason since 2007."
The Celtics seem to always be involved in trade rumors when players become available. The Rockets have a few players who could help the Celtics, some way more than others.