The team announced the moves Friday, a day after finishing the preseason. All three are expected to land on the Santa Cruz Warriors of the NBA Development League.
The 23-year-old Curry, the younger brother of Warriors guard Stephen Curry, signed as an undrafted free agent out of Duke on Aug. 22. He missed most of the summer recovering from surgery on his right knee and shin.
Seth Curry appeared in six preseason games and averaged 2.2 points and one assist in 7.2 minutes. Dedmon played in five games, averaging 3.4 points and four rebounds in 10.3 minutes. Alexander did not appear in the preseason because of a stress reaction in his left leg.