The team released the following statement on Twitter:
Lakers statement on the passing of GM Mitch Kupchak’s daughter, Alina. pic.twitter.com/6x3oQ1Mkhn— Los Angeles Lakers (@Lakers) January 5, 2015
The specific cause of death was not immediately released. Kupchak has been the Lakers' general manager since 2000. He played in the NBA for 10 years, retiring in 1986.