Rees-Zammit shocked the rugby world when he announced at the beginning of the year he was stepping away from the sport to pursue a career in American Football.
The 23-year-old met with several NFL teams after completing a 10-week training camp as part of the league’s International Player Pathway programme.
NFL Network’s Ian Rapoport reported on Friday that Rees-Zammit will sign a three-year contract with the Chiefs, in a deal which will include some guaranteed money and a signing bonus.
Wednesday that Rees-Zammit’s signing with the the back-to-back Super Bowl champion Chiefs will be confirmed on Friday.
The move will see Rees-Zammit link up with the NFL’s premier quarterback Patrick Mahomes, who has been the Super Bown MVP for the last two seasons.