[2] Born in Grand Rapids, Michigan, Mattera went on to star on the women's basketball team while attending Liberty University, where she majored in physical education.

She was a three-time Big South Conference Player of the Year, a Wade Trophy, John R. Wooden and Naismith Award nominee.

Feenstra was the tallest player in Liberty University and Big South Conference history.

She finished her career at Liberty as one of only two players in NCAA history to lead the nation in field-goal percentage in back-to-back seasons (2004, 2005) Mattera was originally selected by the Connecticut Sun on April 16, 2005, during the 2005 WNBA draft, but was quickly traded to the San Antonio Silver Stars in exchange for the Silver Stars' player Margo Dydek (the tallest player in the WNBA).

[6] On November 5, 2019, Mattera was named assistant women's basketball coach at Liberty University.