It wasn't Peyton's mom that left her with Joe Kingman (Dwayne "The Rock" Johnson).
The person we kept seeing talking on the phone to Peyton was actually her aunt. Sadly, Peyton's mom had died in a car accident 6 months earlier.
Peyton at first decides to leave Joe and go back to live with her Aunt Karen, but she has a change of heart when Joe declares he cares more about his daughter than anything else.
Joe and the Boston Rebels win the championship, but Joe couldn't care less because he lives happily ever after with his daughter.