Lisa becomes Bart's Little League coach in order to expand her extracurricular activities, but Bart comes to hate it when Lisa begins sucking the fun out of baseball.

!! Tropes:

* AwesomenessByAnalysis: Lisa's ease with numbers turns the team into a winning machine.
* BaitAndSwitchComment: A commentator said that, speaking of Homer, Lisa's father's name was... not in the list.
* BoringYetPractical: Lisa uses math to lead the team to victory. Bart would rather be AwesomeButImpractical.
* CallBack: Marge recalls Mike Scioscia's radiation poisoning from ''[[Recap/TheSimpsonsS3E17HomerAtTheBat Homer at the Bat]]''. He has become super-smart and a saber metrics prodigy on the in-between.
* ControlFreak: Lisa becomes DrunkWithPower and devolves into this as the episode goes. The ThirdActMisunderstanding happens because she kicks Bart off the team because he went against her orders and went for a home run (which he achieved, by the way) and Bart decides ScrewThisImOuttaHere is better than taking Lisa's nagging anymore.
* GameOfNerds: Lisa is drawn to baseball by being introduced to Sabermetrics by Professor Frink.
* GargleBlaster: Homer has a new brand of his own which involves mixing vodka with ''mayonnaise''.
* GenderBlenderName: When Bart accused Lisa of not understanding baseball, she brought up legendary baseball names of what she believed to be women (Terry Francona, Connie Mack). Nelson tells her those are men.
* JerkJock: When Lisa try to make the group look like the lovable underdog that no one want to coach, Bart corrects her that they won most of their game last year (Boys of Bummer had the team being in the finals) and Nelson corrects her that they are the ''meanest'' team in the league, even harassing one of their best player out of the team because he was a ginger.
* KnowNothingKnowItAll: The aforementioned incident of Lisa claiming that women could coach baseball, using Terry Francona and Connie Mack as examples. Furthermore, as she brings wins to the team, she becomes more of a ControlFreak, to the point that she makes the team study phonebook-sized team tactic books right before starting every game and pretty complicated board drawings on training sessions. The fact that the team is winning is the ''only'' reason why none of them follow Bart into quitting.
* ShoutOut: The episode title (and some plot details) are a homage to ''Film/MoneyBall''.
* SpiritualAntithesis: After a fashion, to the earlier ''[[Recap/TheSimpsonsS18E18TheBoysOfBummer Boys Of Bummer]]''. On ''that'' episode, Bart losing a baseball game was the trigger to the whole town of Springfield to label him a loser and bully him into [[DrivenToSuicide suicidal depression]]. On ''this'' episode, Bart losing the game (after learning that withstanding the team manager even if (s)he's a {{Jerkass}} is worth it for the sake of winning (and keeping families together)) by nearly stealing a home run makes Lisa understand that it's the passion of the game that counts over becoming a winning-obsessed ControlFreak.
* TechnicianVersusPerformer: With Lisa on the "technician" spot (winning by the tactics analyzed thoroughly through Sabermetrics, anything that deviates from them is unacceptable) and Bart on the "performer" spot (the typical "win or lose, what you should have on the field is fun" Aesop).
* TenMinuteRetirement: Bart quitting the team at the end of the second act, only to return to the third after being told that winning is worth minor sacrifices, like withstanding a {{Jerkass}} leader.