Landry Fields scored 15 points and Kyle Lowry had 14 points and six assists in his Raptors debut Wednesday as Toronto defeated the Washington Wizards 104-101 in pre-season play.

Amir Johnson added 13 points, Jose Calderon had 12 points and eight assists, and DeMar DeRozan added 11 points for the Raptors (3-1).

Trevor Booker had 12 points to top the Wizards (1-4), while Emeka Okafor, Martell Webster, Jan Vesely and Bradley Beal had 11 apiece.

The Raptors trailed 77-73 heading into the fourth quarter of a game that had seen 12 lead changes to that point.

Toronto managed to build a three-point lead with a minute left in the game. The Raptors led by a point when Lowry drained two free throws with 13 seconds left to seal it.

Lowry started after missing the first three games of the exhibition schedule — and a good chunk of Toronto's training camp in Halifax — with a groin injury.

Raptors coach Dwane Casey said that more than anything Lowry needed to get out and shake off the rust. But the point guard scored the Raptors' first points of the game off a steal and drive to the hoop, and continued to play with energy and poise for most of the night, in front of a crowd that included Jon Bon Jovi and former Raptor Tracy Murray.

Who will start at point guard has been one of the storylines of training camp, and Calderon came off the bench to do a decent job of running the second unit.

Jonas Valanciunas, the Raptors' fifth pick in the 2011 draft, also continues to generate a buzz with his play just three games into his tenure in Toronto. The big Lithuanian brought his teammates on the bench to their feet with a first-quarter play that saw him pump fake twice before blowing by Okafor for a one-handed dunk.

Toronto's Andrea Bargnani left the game with a left calf contusion in the third quarter.

Turnovers proved costly in a first quarter typical of pre-season basketball, and the Wizards took a 34-24 lead into the second.

The Raptors shot 55 per cent in the second — and held the Wizards to 24 per cent from the field — to lead 54-49 at halftime.

A.J. Price had eight points to pace a Wizards squad that outscored Toronto 28-19 and took a 77-73 lead into the fourth quarter.