Education
While his younger brother Tyler initially chose to become an ice hockey goaltender (though he later changed to being a soccer midfielder himself, playing for University of California Irvine), Nick was interested in soccer and began playing for the youth indoor soccer club, the Cleveland Crunch.
Career
He is currently an assistant coach for Toronto Football Club in Major League Soccer. He was one of the first and youngest American soccer players to have played in continental Europe, joining PSV Eindhoven"s youth side in 1991 and playing there for two years. Playing career
In 1991, his coach at the club, former English striker Ron Wigg, advised then PSV Eindhoven head of youth development Huub Stevens to have a look at Theslof, during a match for which PSV"s reserve team had come to Cleveland.
Stevens, impressed with Theslof"s potential, offered him a youth contract at PSV, which Theslof accepted and moved from his home in Columbus to Eindhoven, the Netherlands.
He subsequently played for PSV for the next two years, before his career abruptly ended due to an Achilles injury. He later moved back to the United States and attended University of California, Los Angeles, where he later played for their soccer team, where his performances were lauded.
On February 1, 1998, the Columbus Crew selected Theslof in the 1998 Master of Library Science College Draft, but he was released during the 1998 season without playing a first team game. He moved to the Orange County Waves for the 2000 USL A-League season.
In 2005 and 2006, Thesloff inserted himself into several Blue Star games.
Coaching career
Theslof began his coaching career as Doctor Jay Martin"s assistant at Ohio Wesleyan University between 1998 and 2000, winning the National Collegiate Athletic Association Division III national title in 1998. Following his stay at Ohio Wesleyan, Theslof became head coach of the Orange County Blue Star, a team of the American Premier Development League and spent time with Juergen Klinsmann who enjoyed Amateur Soccer in Southern California. During that time he also coached future American national team players Sacha Kljestan and Sal Zizzo.
In 2004, Theslof coached his old club PSV"s youth squad in the Netherlands.
In February 2008, after he was appointed manager of Football Club Bayern Munich, Klinsmann appointed Theslof as a second assistant coach and scout.