Better than you might expect. Better than it probably has any right to be. The basic idea is that three grown-ups, who had (putatively) been bullied and ridiculed as kids trying to participate in youth baseball, decide to form a team and compete against kids.
No, really.
The team is made up of Rob Schneider, David Spade, and Jon Heder, a combination with lots of experience in playing oddballs. They have a champion in Jon Lovitz, also despised as a teen, who's now rich (When talking to a contractor building a new stadium, he advises: "Keep it under a billion, that's all I got... on me.")
The movie works on its own terms, because it's unafraid to be as tasteless, lowbrow, and stereotypical as you can be in a PG-13 movie. It embaces and explores these qualities, in fact. You won't be culturally poorer if you miss it. But if you're easily amused (and I am) it's pretty amusing.