[1] A four-year starter, Elfvin was a two-time All-Great Lakes Intercollegiate Athletic Conference (GLIAC) selection for the Eagles.
In his final season at Ashland, Elfvin posted a record of 7–1–2 and allowed just eight goals, the fewest in school history.
The Force folded at the end of the season and the St. Louis Steamers selected Elfvin in the 2005 MISL Dispersal Draft.
The Cougars collapsed at the end of the season and Elfvin found himself selected by the New Jersey Ironmen in the 2007 Dispersal Draft.
In May 2009, the Chicago Storm of the Xtreme Soccer League signed Elfvin to replace injured goalkeeper Jeff Richey.