2012 (Junior): After spending her first two years at shortstop, Marston moved behind the plate and into center field for her junior season. Of her 58 starts, 47 came at catcher, seven in center and four at designated player. Marston posted the third best batting average on the team, hitting .295, and also stole 11 bases in 15 attempts. She set a single-season school record with 46 walks, which were the third most in the Big 12, while her 0.77 walks per game average was 22nd highest in the nation. She also scored a team-best 54 runs that tied her for fifth-most in a single season at Missouri and the third-most in the conference. In Big 12 play, Marston scored 24 runs in 24 games, the most amongst all Big 12 players in league action. She also took 20 walks during the conference season, third-highest amongst Big 12 players. She finished third on the team with 10 multi-hit games, three of which were three-hit performances. On March 10 against Boise State, she drove in a season-high three RBI and recorded one of her two triples on the year. On two separate occasions, Marston had games where she didn't record a single at bat. The first came against Baylor on March 31, where she took three walks in the game. The next day, she walked in her first two plate appearances to make it five straight plate appearances with a walk. Over a six game span from March 28-April 5, Marston drew 10 walks. Her second game without an at bat came on April 11 against Northern Iowa, where she took a walk in all four plate appearances, the first time a Tiger drew four walks in a single game since 2007. In her first year behind the plate, Marston enjoyed her most successful defensive season yet, recording a .992 fielding percentage while committing just three errors. She threw out eight runners trying to steal on the year. Honors: CoSIDA First Team Academic All-American, CoSIDA Academic All-District, Second Team All-Big 12, First Team Academic All-Big 12
2011 (Sophomore): Following a stellar freshman campaign, Missouri's starting shortstop impressed again as a sophomore, earning First Team All-Big 12 recognition for the second straight year. For the season, Marston hit .311 with two home runs and 20 RBI, while registering 15 doubles (T-3rd in Big 12), scoring 57 runs (T-2nd in Big 12), and walking 41 times (44th in NCAA, second most in a single season at Mizzou). She opened the year with two straight two-hit games, going 2-for-3 with two runs, a double, a home run and three RBI against San Diego State before going 2-for-4 with a triple, a run and an RBI against Fresno State the next day. She posted a three-hit performance against South Florida, her lone three-hit game of the season. A week later, Marston started an 11-game hitting streak after singling in game two against Drake. During the streak, Marston hit .433 (13-for-30) with a homer, three doubles, 18 runs, eight walks and four stolen bases. In the twin-bill with Kansas, she went 3-for-7 with two runs, a double and an RBI. She opened the month of April with hits in four straight games, going 5-for-12 with four runs, two doubles, three walks and a stolen base. She closed the month with three straight two-hit games, two of which came against Big 12 opponents. After going 1-for-3 with a walk in the Nebraska opener, Marston closed the series by going 2-for-4 with a double and a run as the Tigers salvaged a split. Later that week against SIUE, she went 2-for-3 with three runs driven in while also swiping a bag. In the team's first game with Oklahoma State, she finished 2-for-4 with two runs and a pair of doubles. She helped the Tigers to a split with Texas with a 2-for-2 day, driving in two runs and scoring twice in the series finale. The following weekend, she posted four hits in a doubleheader against Iowa State, scoring five runs across the two games while doubling twice, guiding the Tigers to their first regular season Big 12 title since 1997. Marston recorded four hits at the NCAA Regionals, including two in the regional championship against DePaul. She recorded three walks and scored three times in Mizzou's two-game sweep over Washington at the NCAA Super Regionals, and picked up a pair of hits at the Women's College World Series. Honors: ESPN the Magazine/CoSIDA Academic All-District VII, First Team All-Big 12, First Team Academic All-Big 12
2010 (Freshman): Played in all 64 games, starting 63 of those at shortstop. Collected the second most hits amongst Big 12 players, while also coming in fifth in runs scored. Tied for third in the league in doubles, and had the fourth most runs batted in. Her 16 doubles were the third most in a single season in program history, and her 68 hits tie her for 10th in a season while ranking ninth for most RBI in a season. Went 2-for-3 and scored three times in Mizzou's run-rule win over No. 2 Alabama on Feb. 14. Hit her first home run while driving in a season-best four RBI against UMKC on March 7. Went 7-for-16 (.438) at the plate with four RBI, three runs scored and four stolen bases at the Demarini Invitational. With the Tigers down 4-2 in the bottom of the seventh against Border Showdown rival Kansas, Marston delivered a three-run, walk-off home run. Picked up her first career triple against Texas A&M on April 24. Went 5-for-10 with four runs, three doubles, a home run and three RBI in doubleheader sweep over Iowa State. Jumpstarted the Missouri offense against Texas at Big 12's with a three run home run in the second inning, putting the Tigers ahead on their way to an 11-6 win over the top-seeded Longhorns. Had 15 multi-hit games during the regular season, the second-most on the team. Led all Tigers with 13 multi-RBI games.Honors: Second Team All-Midwest Region, All-Big 12 Tournament Team, First Team All-Big 12.
During the summer of 2010, Marston was selected to play for the USA National Women's Baseball Team, who competed in the IBAF Women's Baseball World Cup in Venezuela. Marston was selected to the All-Tournament Team after posting the second highest batting average during the tournament (.593) and leading all tournament competitors with 16 hits and eight doubles. She finished with 12 runs scored, seven runs batted in, was a perfect 3-for-3 on stolen bases, posted a team-best .636 on-base percentage and a slugging percentage of .889, second-highest on the team. Marston and Team USA beat Venezuela 15-5 to take home the bronze medal.
Principia: A shortstop and outfielder for the Principia Panthers, Jenna Marston excelled both on and off the field. Under the direction of Ken Leavoy, Marston was selected for the all-state team during her junior and senior seasons. She played four years for the softball club team, the St. Louis Diamond Cats. In addition to softball, Marston also played basketball for the Panthers receiving 12 letters throughout her four years as a high school athlete. Academically, Marston was on the Honor Roll and graduated Cum Laude of her 2009 class.
Personal: The daughter of Bill and Cindy Marston, Jenna Marston was born July 16, 1991, in St. Louis, Mo. Jenna has an older brother, Christopher, who played baseball for Drury University. Marston is majoring in Industrial Engineering.