Theo has always been known for his defensive efforts and especially as a shot blocker. He has played for several NBA teams including 76ers, Hawks, Trail Blazers, and Pistons.
In 2001, Ratliff was voted Eastern Conference starting center. Unfortunately, due to a injury, he was unable to play. The very same season, he was part of the Sixers team who made it to the NBA Finals but prior to the playoffs, he got traded to the Hawks in exchange for Dikembe Mutombo.

