Grant, from Montreal, was dropped by a short right-hand in the 10th round after suffering a beating for much of the scheduled 12-round bout. Grant's chief second, Russ Anber, also his trainer and manager, threw the towel into the ring 1min 18secs into the 10th round of the scheduled 12-round bout, even though his fighter had risen from the floor. Jones had floored Grant with a right uppercut in the sixth.
Jones' win on Saturday gives him a record of 38 wins and one defeat while Grant, a recreation counsellor, has 31 wins, two draws and one defeat.
On the undercard, Shane Mosley retained his International Boxing Federation lightweight title when James Leija failed to make the 10th round.
Frenchman Fabrice Tiozzo retained his WBA cruiserweight title, stopping Ezequiel Paixao of Brazil in the second round at Mont-de-Marsan.Reuse content