A day after a Bloomsburg University baseball player was released from the team for calling Mo'ne Davis a "slut" on Twitter, the 13-year-old Little League World Series star asked the university to give him another chance.

Davis, who was a pitcher with Philadelphia's Taney Dragons, e-mailed university president David L. Soltz on Sunday evening and asked the school to reconsider its release of Joey Casselberry.

"While I admit I was pretty hurt when I read his comments, I felt sad that he was dismissed from the team," the teen pitcher wrote. "I am sure Joey Casselberry has worked very hard to get where he is and dreams of playing in the major leagues. For this reason, I'm asking you to please allow him back on the team so that he can continue to chase his dream. He made one dumb mistake. I'm sure he would go back and change it if he could."

Friday night, Casselberry posted a tweet saying, "Disney is making a movie about Mo'ne Davis? What a joke. That slut got rocked by Nevada."

His post was made in reaction to the news that the Disney Channel will make a movie about Davis. The Dragons lost, 8-1, to a Nevada team in the series last year; Davis pitched 21/3 innings.

By Saturday night, Casselberry's Twitter account was deactivated, though not before his tweet was captured via screen shots and circulated widely.

Bloomsburg took to Twitter to announce the first baseman's release, saying that the school was "deeply saddened" by Casselberry's tweet and that "his words do not represent Bloomsburg University."

Before his Twitter account went dark, Casselberry tweeted an apology, saying "one stupid tweet can ruin someone's life and I couldn't be more sorry about my actions last night. I please ask you to . . .. Forgive me and truly understand that I am in no way shape or form a sexist and I am a huge fan of Mo'ne. She was quite an inspiration."

Casselberry, a junior, is a graduate of Methacton High School in Montgomery County and an Eagleville native, according to the Bloomsburg team's website.

A spokesman for the university released a statement Monday saying Bloomsburg stands by its decision.

"Her request demonstrates the type of person she is, her level of maturity and the empathy that her family and coach teach her," the statement read. "Bloomsburg University stands firm on our decision; however, his consequences will be reviewed as is common in disciplinary actions like this."

Inquirer staff writer Martha Woodall contributed to this article.