Calderon, who will turn 32 before the start of the season, was traded to the Pistons last season after seven years in Toronto. He averaged 11.3 points and 7.1 assists, continuing to be the solid, pass-first point guard he has been throughout his career. He shot 47 percent from the field and 43 percent from behind the three-point arc. Calderon tends to struggle on the defensive end and is easily beaten off the dribble.
Calderon joins a veteran nucleus in Dallas that missed the playoffs last season. After missing out on free agent Dwight Howard on Friday, owner Mark Cuban tweeted that the "Mavs are back open for business."
Dallas drafted point guard Shane Larkin in the first round of the draft last week; it is unclear on how coach Rick Carlisle will use the two guards moving forward, although Calderon should serve as a quality mentor for the young guard out of Miami.
The Mavericks are not able to officially announce the signing until July 10.