The Grizzlies then traded Calderon to the Detroit Pistons for forwards Austin Daye and Tayshaun Prince.
“This is the type of deal we have been looking for to take our team another step forward,” Raptors President and General Manager Bryan Colangelo said in a statement. “Rudy Gay is a dynamic wing that elevates our talent level significantly.”
Haddadi, 27, the first Iranian-born player in the NBA, has averaged 2.0 points, 2.1 rebounds and 6.1 minutes in 134 career outings, all with Memphis.
Davis, 23, was drafted by the Raptors with the 13th overall pick in 2010. He has appeared in 176 outings with Toronto, averaging 7.7 points, 6.8 rebounds and 24.0 minutes.
Calderon, 31, is averaging 11.1 points, 2.4 rebounds and 7.4 assists in 45 games this season. Last season, the eighth- year player from Spain ranked fourth in the NBA with 8.8 assists per game.
Prince, 32, chosen with the 23rd overall pick by the Pistons in the 2002 draft, has averages of 12.8 points, 4.7 rebounds and 2.6 assists in 769 career games. Daye, 24, is in his fourth NBA season and holds averages of 5.8 points and 2.9 rebounds in 206 career games.
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