Veteran small forward Dominic McGuire will likely be released to open up a roster spot for the Frenchman.
Pietrus played in 42 games for the Boston Celtics last season, averaging 6.9 points and 3.1 rebounds in just under 22 minutes per contest. He's a career 43-percent shooter, but he has shot 36 percent from downtown.
On top of that, the 30-year-old is known as a good defender, using his on-ball skills and length to disrupt opponents.
This season, the Raptors are ranked 17th in points per game and 25th in field-goal percentage leading up to Thursday's games. They are also ranked 19th in three-point percentage.
Beyond that, they have allowed 101.5 points per game, tied for 27th in the NBA, while allowing opponents to shoot 45.9 percent from the floor, tied for 26th in the NBA.
It's a main reason why Toronto is 3-13 this season and has an average point differential of minus-5.6, among the worst marks in the league.
The Raptors lost to the Memphis Grizzlies on Wednesday, 103-82.
Pietrus is a bit player, but he is a veteran who knows the league and can generally hit three-pointers and play strong defense. It won't be a move that makes a big impact, but it's better than nothing.
Given what has transpired in Toronto so far, the Raptors need all the help they can get.