2014-15 Northwestern Match-by-Match Results
2013-14 Northwestern Match-by-Match Results 
2012-13 Northwestern Match-by-Match Results
2014-15: Secured his first trip to the NCAA Championships with a 7th place finish at 141 lbs. at the 2015 Big Ten Championships at Ohio State (3/8) … Began the tournament as the No. 7 seed in his weight class … Beat Michigan's George Fisher by 7-2 decision in the first round (3/7) … Earned a spot on the podium with a 7-4 decision over Penn State's Kade Moss (3/7) … Won 7th place via forfeit by Wisconsin's Jesse Thielke (3/8) … Was 1-2 at the NCAA Championships in St. Louis … Beat North Dakota State's Mitchell Bengtson by a 9-1 major decision (3/19) … Had a 22-14 record for the season ... Was second on the team with seven wins by fall with all seven of them coming in the first period … Went 12-5 in bonus-point matches ... Reached a season high nine matches over .500 at the Windy City Duals (12/6) … Did it again after the Big Ten Championships (3/8) … Began the season with six straight victories, including an upset of No. 10 Zachary Horan of Central Michigan in sudden victory at the EMU Duals (11/15) … Northwestern starter all season at 141 lbs.
2013-14: Redshirt season...Went 26-8 wrestling unattached...Won 141 lbs. title at Wisconsin Open (12/7)...Won title at UW-Parkside Tournament (12/7) by recorded a fall over UW-Whitewater's Matt Adcock at 1:43...Took first at Duhawk Open in Dubuque, Iowa (141), winning four matches...Won first two matches of the season at Michigan State Open...Competed at Eastern Michigan and Wisconsin Open, winning seven consecutive matches...Recorded four wins at Cleveland State Open (12/14)...Competed unattached at 51st Midlands Championships...Recorded six consecutive wins from 2/1 to 3/2 at Duhawk Open and the National Collegiate Open...Ended year winning final four matches at National Collegiate Open (3/2).
2012-13: Went 6-6 on the year at 141 ... 2-3 in duals ... two falls, a major decision and tech fall ... Placed second at the 2012 Keystone Classic ... Wrestled at Midlands ... Pinned No. 20 Kevin Fanta of Northern Illinois during the dual season.
2011-12: Lone true freshman starter for Northwestern this year ... Went 12-14 overall and 7-7 in dual action at 133 lbs. ... Won seven-straight matches from Nov. 20-Dec. 29 ... Placed third at the Keystone Classic ... First collegiate match was against No. 7 Ryan Mango of Stanford ... Third on the team with eight falls ... Won first Big Ten dual on Jan. 8, pinning Wisconsin's Shane McQuade in 6:27 ... All three of his Big Ten dual wins came with bonus points ... Pinned MSU's Brandon Fifield and 11-0 major decision over Indiana's Joe Duca ... Competed at the 2012 Big Ten Championships ... Wrestled at 2012 FILA Junior National Championships (April, 2012) ... Finished runner-up at 138.75 lbs./63 kg to qualify for the U.S. Junior World Team Trials.
High School: Finished top-four at the IHSA state tournament all four years of his career and won the 2009 state championship at 119 pounds ... Four-time regional and sectional champion ... Overall career record of 153-12, setting the all-time wins record at Lockport High School ... Helped Lockport win first-ever regional championship in 2010 ... 2011 Illinois Freestyle state champion at 135 pounds ... Cadet Freestyle All-American (fifth place) and FILA Cadet All-American (sixth place) ... Member of Illinois team that defeated Minnesota for Cadet National Duals freestyle championship in 2009 ... Trained at Overtime School of Wrestling.
Personal: Born Jameson Michael Oster ... Son of Martin and Cathy Oster ... Three older brothers ... Brother Jake was a four-time Division III All-American and a national champion at Elmhurst College ... Oldest brother Josh was an assistant coach at Lockport for eight years and took over as head coach following the 2011 season ... High school teammate of NU's Kevin Bialka ... Chose Northwestern over Illinois ... Major is undecided.
| Season | Overall W-L | Dual Meet W-L | Big Ten W-L | Dual Points For-Against | Big Ten Champs. | NCAA Champs. | Pins For-Against | Tech Falls For-Against | Major Dec. For-Against |
| 2011-12 | 12-14 | 7-7 | 3-5 | 38-29 | DNP | -- | 8-4 | 0-0 | 2-4 |
| 2012-13 | 6-6 | 2-3 | 0-1 | 9-9 | -- | -- | 2-0 | 1-0 | 1-0 |
| 2013-14* | 26-8 | -- | -- | -- | -- | -- | 11-3 | 1-0 | 2-1 |
| 2014-15 | 22-14 | 13-7 | 4-5 | 53-24 | 7th | DNP | 7-4 | 1-0 | 4-1 |
| Career | 40-34 | 22-17 | 7-11 | 100-62 | -- | -- | 17-8 | 2-0 | 7-5 |
*Redshirt Season - Wrestled Unattached