2014-15: Freshman member of Northwestern's distance freestyle group … Ranked third on NU's top times list in the 1,000 free and 1,650 free, and fourth in the 500 free following the season … Swam career-best times in all three of his events at the Big Ten Championships … Swam the 1,650 free over 30 seconds faster to place 24th in the conference in 15:35.60 … In the 500 free, cut a full 8.0 seconds from his previous best to finish 40th in 4:30.54 … Dropped 2.08 seconds in the 200 free to place 50th at the B1G meet … Finished ninth in the 1,650 at the Wildcats' home TYR Invitational (11/21-11/23) to score points for NU … Won the bonus final of the 500 free at the TYR with a 4:38.54 that represented a 5.62 second drop from his preliminary time in the race … Also had a TYR second swim in the 100 back, placing 21st … Scored dual meet points for NU five times during the year, all in the 1,000 free event … Best finish in the race was a second-place effort in a double dual sweep of UIC and Oakland (10/25) … Competed at AT&T U.S. Winter Nationals to conclude the fall, swimming in the 1,650 free, 500 free and 200 free.
High School: Ranked as the No. 6 swimmer in Connecticut by Collegeswimming.com ... All American and All state during the 2013-14 year ... Lettered in swimming for two season 2011-12 ... FCIAC CO-MVP 2013 ... Norwalk Hour All-Area MVP 2013-14, and Norwalk Hour All-Area team 2012-14 ... Connecticut Post All-Star 2013-14 ... Team Achievements include FCIAC Record Holder 500 free ... Record holder in the 100 free, 200 free, 400 free, and 500 free ... Also competed with club team from 2003-2014 ... Won second place in the YMCA sort course championships 2014, fifth place for 500 free 2013 ... Connecticut Senior long course champion 1500 free and 800 free 2013 ... Connecticut distance High Point winner 2012 ... Club team record holder 400, 500,1 000 free ... Junior National qualifier 2013-2014.
Personal: Born Jonathan Rock Blansfield ... Son of Lourdes and David Blansfield ... Chose Northwestern over Indiana ... Major is undeclared.
BLANSFIELD'S PERSONAL BESTS
| Event | Personal Best |
| 200 freestyle | 1:42.60 |
| 500 freestyle | 4:30.54 |
| 1,000 freestyle | 9:41.01 |
| 1,650 freestyle | 15:35.60 |