2012: The homegrown goalkeeper fractured his ankle in early summer and made his return to the playing field on September 11 in a 1-0 Reserve League loss to Real Salt Lake at Sporting Club Training Center in Swope Park. Kempin was shown a red card in the match for denying an obvious goalscoring opportunity in the 61st minute. Kempin played in seven additional Reserve League matches prior to his injury, earning one shutout and a 1.44 goals against average on the season. Kempin made his competitive debut in a 3-2 victory over the Orlando City SC in the Lamar Hunt U.S. Open Cup Third Round.
2011: In matchday 18 for matches at FC Dallas and Toronto FC as backup to Eric Kronberg. Played full 90 minutes in MLS Reserve League match against Chicago Fire on July 28th at Sporting Park
2010: Kempin became Kansas City’s first Home Grown Player on August 31, 2010. At age 17, was the youngest signing in club history. Kempin signed a Generation adidas contract for the 2010 season and dressed for his first professional match against San Jose on October 23, 2010 as a backup to Eric Kronberg.
Active member in the United States Under-18 and Under-20 National Team pools, having played for the U18 National Team in Israel in December 2010 and starting both matches for the U20 National Team at the Torneo de las Americas in November 2010. Also participated in a 36-player U18 National Team training camp in Carson, California in January 2010 and was called upon again in April 2010 as one of two goalkeepers in a 24-player training camp also held at the Home Depot Center. Kempin had taken part in a U.S. Under-15 training camp in St. Louis in June 2008. Following that camp, Kempin was chosen as one of four goalkeepers for the Fall 2008 and Spring 2009 semesters for the U.S. Soccer Under-17 Residency Program under head coach Wilmer Cabrera at the IMG Academy in Bradenton, Florida.
Product of the Sporting Kansas City Juniors development academy. Named to the 2010 NSCAA/People to People Boys Youth All-America Team, as one of 40 players selected by youth national team and college coaches. Kempin was also honored as Gatorade’s Kansas State Player of the Year in February 2010 and was selected to Parade Magazine’s High School All-American Team in June 2010. Kempin was also named among the nation’s Top 40 Players to Watch by ESPN RISE.
He has been a regular member of the Olympic Developmental Program’s State and Regional Teams, including a U14 Regional Team that traveled to Barcelona for international competition. Prior to joining the Sporting Kansas City Juniors developmental academy, Kempin played for the KC Legends, Blue Valley Stars, and KCFC Alliance club teams.
Kempin attended Blue Valley North High School in Overland Park, Kansas and grew up in Leawood, Kansas.