Rhonda Rajsich is an American racquetball player. She has been World Champion in Women's Singles twice, and Pan American Champion 6 times, as well as US Open champion four times. Rajsich was the #1 player on the Ladies Professional Racquetball Tour season ending rankings four times – three straight seasons from 2005–06 to 2007-08 and then again in 2010–11. She is of Serbian descent.

Racquetball is a racquet sport and a team sport played with a hollow rubber ball on an indoor or outdoor court. Joseph Sobek invented the modern sport of racquetball in 1950, adding a stringed racquet to paddleball in order to increase velocity and control. Unlike most racquet sports, such as tennis and badminton, there is no net to hit the ball over, and, unlike squash, no tin to hit the ball above. Also, the court's walls, floor, and ceiling are legal playing surfaces, with the exception of court-specific designated hinders being out-of-bounds. Racquetball is played between various players on a team who try to bounce the ball with the racquet onto the ground so it hits the wall, so that an opposing team’s player cannot bounce it back to the wall.