Mary was a four-year letter winner for the Missouri Southern Women's Track and Field team from 2000-04 under coach Patty Vavra. Mary earned All-American honors five times in her career at Southern taking second place in the 400m hurdles in 2001, 03, and 04 and placing fourth in 2000. She earned NCAA D-2 Regional Female Athlete of the Year honors for her performance during the indoor season in 2004. Mary also was a three time MIAA champion winning the 400m and 600yd indoor titles and the outdoor 400m hurdle titles during her senior campaign.
Mary holds the school indoor records in the 400m dash and the 600yd run and the outdoor 400m hurdles. She holds all top 10 times in the 400m hurdles and holds eight of the top 10 times in the indoor 400m dash. She also has the second best time in the indoor 220m dash and the outdoor 400m dash. In 2004, Mary earned MIAA Athlete of the Week nine times and was the MSSU Female Athlete of the Year in 2003 and the E.O. & Virginia Humphrey Award winner in 2004. Mary was also a success in the classroom as she earned Verizon Academic All-American honors including first team honors in 2003 and 2004. She was also a finalist for the Ken B. Jones award which is the highest award the MIAA gives out to student athletes.
After graduating from Missouri Southern, Mary went on to earn her masters and doctorate's degrees in psychology from Iowa State University. She is married to Jeremiah Still and they live in San Jose, California where Mary is a psychology professor at San Jose State University.