Morocco Elijah Tyson arrived Jan. 25 in Henderson, Nev., weighing in at 8 lbs., 13 oz., and measuring 19 inches in length.
"He is such a sweet and calm baby. Mike and Kiki are overwhelmed with joy to welcome their son to the Tyson family," the boxer's rep tells PEOPLE.
Morocco is the couple's second child together. They have a 2-year-old daughter named Milan.
Reporting by CHAMP CLARK and LIZ McNEIL