A Columbus, Ohio, native, Haynes attended The Wellington School for high school. Haynes tallied 2,222 points and 430 steals in her high school career. She currently holds a bachelor in political science from Michigan State University and a master’s in sport management from Western Michigan University.Haynes is a 2017 inductee into the Greater Columbus Basketball Legends Hall of Fame.

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During her time at Michigan State, she made the Big Ten All-Freshman team (2004). Under Coach P in 2005, her team was Big Ten Champions, Big Ten Tournament Champions and advanced to the NCAA Final Four. She was Big Ten Honorable mention in 2005 and in 2006 as the Spartans went to the NCAA Sweet Sixteen.Haynes was also part of the Big Ten Foreign Tour Team in 2006, where she played with fellow Big Ten players against teams in Norway, Sweden and Denmark. As a senior, Haynes made second team All-Big Ten and All-Big Ten Defensive team (2007). Haynes capped her career ranking third at Michigan State in steals (245), 16th in scoring (1000-point club), 10th in three-point field goals made and 13th in assists. As a captain, she was a member of the winningest senior class in school history with 103 victories.

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After her collegiate career, Haynes played professionally overseas for Pro Build Lions in Amsterdam, Netherlands (2007-08). Her team was Netherlands Cup Champions, while averaging 18.0 points, 4.0 rebounds and 3.0 steals per game. In 2008-09, Haynes played for the Catz of Lappeenranta, Finland, where her squad finished as League Champions (21-1 record) and tournament runner-up. In 2009-10, Haynes played for FoA in Forssa, Finland, where she was the third leading scorer in the country, averaging 20.5 points, 5.0 rebounds, 3.0 assists and 2.0 steals.