2004-05: A season later and a lot of hard work put in during his spare time, Zimmerman took his game to a new level. Offensively, his production increased dramatically, doubling his eight points last year to 16. Even more remarkable, though, was Zimmerman's defensive play, which saw him earn a +4 rating, only one of six Chief players to be positive in terms of plus/minus. Zimmerman was then selected in the 2005 NHL Entry Draft in the 6th round by the New Jersey Devils.
2005-06: The third-year Spokane Chief had another respectable season. Both of Zimmerman’s goals this season were game winners. Along with his two goals, Zimmerman compiled a respectable 17 assists, and a +3 rating, tied for tops on a Spokane team that was one of the WHL’s worst this season. His durability over his three-year career in the WHL is something that shouldn’t be overlooked as he has played in all but six of the Chiefs’ 216 games, including all 72 games this season.
2006-07: Zimmerman had another solid, yet unspectacular junior season in Spokane with the Chiefs. In 60 regular season games, Zimmerman recorded two goals and 12 assists, to go along with 69 PIM’s. His +9 rating was good enough to place him second overall on the Chiefs. His steady play did not go unnoticed by the selectors of the American entry to this past winter’s World Junior Championships as Zimmerman represented his country at the tourney where Team USA took home a bronze medal.
2007-08: Zimmerman had an up and down season, seeing some time with Trenton in the ECHL early on before spending the majority of the second half of the season in Lowell. In 66 games, he recorded six assists, a -17 rating and 66 PIM's.
2008-09: Loaned to the Central Hockey league, Zimmerman played 20 games in the desert scoring 3 assists before ending up in San Antonio of the AHL for 35 games, with 2 goals.
2009-10: Sean continued his time with San Antonio spending the full season there with 2 more goals and 9 points in total.
2010-11: Zimmerman was traded twice during the season and played for three different AHL clubs in his fourth pro season. Zimmerman skated in seven games for Rochester (Florida) prior to being traded from the Panthers to Boston in December 2010. After 23 games with Providence, he was traded again in February 2011, going from the Boston Bruins to the Anaheim Ducks. Zimmerman played 21 games for the Syracuse Crunch. In 51 AHL games total, he had 7 assists and was -7 with 47 PMs. Zimmerman was re-signed to a one-year contract by Anaheim in June 2011.
Zimmerman is a stay-at-home defenseman who relies on positioning and smarts to get the job done. He will never wow anyone with his blazing speed or put up obscene point totals, he simply works hard, competes hard, reads the play and makes the simple play.
With injuries and mixed form limiting both his ice time and his development to this point, it seems difficult to envision Zimmerman in an NHL uniform.