Penn State extended its losing streak to four games, its longest of the season.
In the teams' first meeting this season, Melody Coombs engineered a timely bunt to bring home Lilia Crouthamel and secure a walk-off win to move on to the conference tournament quarterfinal game.
Mitchell chose Penn State over offers from Arkansas, BYU, and Oklahoma State.
Emily Maddock was the lone Nittany Lion to earn a nod to the All-Big Ten first team after an impressive season.
Sessoms will join fellow Penn State alumni Myles Dread, Tony Carr, Josh Reaves, Shep Garner, Mike Watkins, Jamari Wheeler, Trent Buttrick, and more on the team.
Kristin O'Neill, Gretchen Gilmore, and Ellie Hollin were all recognized ahead of the NCAA Tournament.