Background
Greer attended high school at All Saints Catholic Secondary School in Whitby, and grew up playing box lacrosse.
Greer attended high school at All Saints Catholic Secondary School in Whitby, and grew up playing box lacrosse.
Greer"s brother, Bill, plays for the Toronto Rock in the National Lacrosse League. Greer played junior box lacrosse with the Whitby Warriors of the OLA Junior A Lacrosse League. In 2003, he was awarded the "Joey Nieuwendyk Award" for Rookie of the Year.
He was also awarded the "Dean McLeod Award" for Playoffs M.V.P in 2004.
Duke University
In 2006, Zack Greer and his teammate Matt Danowski led the Duke Blue Devils high powered attack to the 2007 National Collegiate Athletic Association Final Four. Duke faced Johns Hopkins University in the final, only to lose after mounting a strong comeback at the end of the game.
In 2008, Greer led Division I in goals scored, helping to lead Duke to the Final Four once again. However, Duke fell short, losing to Johns Hopkins in the semi-finals.
Greer was a four-time All-American including two times on the first team at Duke, who holds the all-time Duke and National Collegiate Athletic Association lacrosse goals record.
Resulting from "unusual circumstance," the National Collegiate Athletic Association granted 33 Duke Lacrosse players, including Greer, a rare fifth year of eligibility. which was granted to many players of the Duke lacrosse team in return for their season being cancelled in 2006 because of the Duke University lacrosse team scandal
Bryant University
Greer used his fifth year of eligibility to pursue a graduate business degree at Bryant University in the fall of 2008 where he played under former Duke head coach, Mike Pressler. In 2009, Bryant University, a former Division II school, played Division I college lacrosse for the first time. At the end of Bryant"s 2009 National Collegiate Athletic Association Division 1 Season, Greer netted 42 Goals and 26 Assists combining for 68 points.
Since Bryant was transitioning to Division I that season, Greer"s statistics for 2009 do not count toward official National Collegiate Athletic Association Division I records.
The Long Island Lizards selected Greer with the third pick overall in the 2009 MLL draft. The Long Island Lizards traded Greer in the 2012-2013 offseason to the Denver Outlaws in exchange for Midfielder Collin Briggs.
On September 9, 2009, Greer was drafted 3rd overall in the 2009 entry draft by the Minnesota Swarm. Greer finished his rookie season with 10 goals and 23 points.