Playing career

Undrafted, MacKenzie played junior hockey with the Thunder Bay Flyers of the USHL, before playing collegiate hockey with the University of Denver for four years. After his senior year with the Pioneers, MacKenzie turned pro signing with the St. Louis Blues on October 6, 2003.

MacKenzie made his professional debut in the 2003-04 season with Blues affiliate, the Worcester IceCats of the AHL. While never playing a game with the Blues, Mackenzie became a fixture in the AHL, playing with the Blues affiliates for 5 years.

On July 14, 2008, MacKenzie signed with the Colorado Avalanche and was assigned to affiliate, the Lake Erie Monsters, to start the 2008-09 season. MacKenzie received his first NHL recall on November 29, 2008, but did not feature in a game for the Avalanche. Towards the end of the season, MacKenzie was recalled again to the Avalanche on April 4, 2009, and made his NHL debut in a 4-1 victory against the Vancouver Canucks on April 5, 2009.

Unsigned prior to the 2009-10 season, MacKenzie signed with the Idaho Steelheads of the ECHL on October 19, 2009. After appearing in 3 games with the Steelheads, Aaron left the team to sign with HC Pardubice of the Czech Extraliga on November 2, 2009. MacKenzie settled as a stay-at-home defender in the Czech Republic and appeared in 29 games to help, the Dominik Hašek inspired Pardubice, capture the Championship for the first time since 2005.

On June 16, 2010, Mackenzie left Pardubice and signed as a free agent to a one-year contract with Austrian team, EHC Black Wings Linz of the EBEL.

On June 12, 2012, MacKenzie signed with the Central Hockey League's Denver Cutthroats, making him the first signed player in franchise history. After two seasons as captain of the Cutthroats, and coming off a finals appearance, MacKenzie was due to return for a third season in the ill fated CHL before the club announced its suspension of operations, effectively ending MacKenzie's professional season.

Career statistics

				Regular season						Playoffs
Season	Team	League		GP	G	A	Pts	PIM		GP	G	A	Pts	PIM
1998-99	Thunder Bay Flyers	USHL		49	8	12	20	123		3	0	1	1	0
1999-00	U. of Denver	WCHA		40	1	9	10	56		—	—	—	—	—
2000-01	U. of Denver	WCHA		37	2	6	8	45		—	—	—	—	—
2001-02	U. of Denver	WCHA		39	5	18	23	30		—	—	—	—	—
2002-03	U. of Denver	WCHA		41	11	21	32	33		—	—	—	—	—
2003-04	Worcester IceCats	AHL		66	5	9	14	108		10	0	2	2	10
2004-05	Worcester IceCats	AHL		75	2	13	15	106		—	—	—	—	—
2005-06	Peoria Rivermen	AHL		51	2	7	9	35		4	0	0	0	6
2006-07	Peoria Rivermen	AHL		67	1	6	7	46		—	—	—	—	—
2007-08	Peoria Rivermen	AHL		55	0	5	5	20		—	—	—	—	—
2008-09	Lake Erie Monsters	AHL		52	3	9	12	50		—	—	—	—	—
2008-09	Colorado Avalanche	NHL		5	0	0	0	0		—	—	—	—	—
2009-10	Idaho Steelheads	ECHL		3	0	0	0	2		—	—	—	—	—
2009-10	HC Pardubice	CZE		29	0	1	1	24		6	0	1	1	8
2010-11	EHC Black Wings Linz	EBEL		49	3	7	10	100		5	0	0	0	0
2011-12	Tohoku Free Blades	ALH		36	9	14	23	36		—	—	—	—	—
2012-13	Denver Cutthroats	CHL		20	4	6	10	10		—	—	—	—	—
2013-14	Denver Cutthroats	CHL		59	8	17	25	52		16	2	4	6	14
2014-15	Sun Valley Suns	BDHL		4	2	2	4	2		—	—	—	—	—
NHL totals				5	0	0	0	0		—	—	—	—	—
AHL totals				366	13	49	62	365		14	0	2	2	16

Awards and honors

Award	Year
All-WCHA Third Team	2001-02
All-WCHA First Team	2002-03

[ Source: Wikipedia ]