The Mavericks made it official with DeJuan Blair on Wednesday signing the big man to a one-year contract that will be worth about $1.4 million. The deal brings the Mavericks’ official roster to 15 guaranteed contracts. Blair is undersized as a center/power forward at 6-7 but at 270 pounds he has the ability to be a banger in the paint. He played for the San Antonio Spurs his first four seasons and averaged 9.5 points and 5.5 rebounds in 2011-12. Last season he saw his playing time and production drop.