2014: Picked up a ground ball in MU's 12-10 victory at Michigan (Feb. 28) ... Recorded a draw control in a 15-9 victory at Detroit (March 2) ... Notched one ground ball during 12-10 victory over Michigan (Feb. 28) ... Tallied one draw ball during 15-9 win at Detroit (March 2) ... Picked up one ground ball and one draw control during 10-14 loss to Duquesne (March 7) ... Garnered a pair of ground balls and caused two turnovers during 13-6 victory over Winthrop (March 23) ... Scooped up one ground ball in 14-6 win over Cincinnati (March 28) ... Recorded a pair of ground balls and one caused turnover in 6-12 loss at Rutgers (April 11) ... Had one draw control during MU's 7-11 loss vs. Temple (April 17) ... Notched oneground ball and caused one turnover during 9-10 loss to vs. Villanova (April 19) ... Registered twoground balls in 5-11 loss to USC (April 27). Played in all 17 games during her sophomore season.
2013: Registered nine groundballs, four draw controls and 3 caused turnovers on the season ... Saw action in all 17 games (eight starts) ... Netted one goal in a 4-9 loss to Rutgers (March 24) ... Scooped three groundballs in a loss to Cincinnati (April 5).
High School: O'Brien played high school lacrosse at Loyola Academy ... Captured a state championship all four years at Loyola ... Was team captain her senior year ... Second team all-state as a junior ... Helped Ramblers to a No. 17 national ranking (21-2) as a junior and No. 25 ranking (22-3) as a senior ... Played at the 2011 Under Armour Underclassmen Games for the Midwest girls squad and at the US Lacrosse National Tournament for the Chicago Metro team ... Was a regional competitor in figure skating.
Personal: O'Brien is the daughter of Melissa and Brad O'Brien ... Has four siblings, Billy Katie, Tim, and Jimmy ... Sister, Katie, played lacrosse at Georgetown ... Brother, Tim, plays hockey at Dartmouth ... Competed as a figure skater as a youth.