The Girl Who Loved Tom Gordon by Stephen King

Somewhere in New England, nine-year-old Trisha gets lost in the woods while on a walk with her family. Her only comforts are the radio broadcasts of Boston Red Sox games featuring her favorite player, closing pitcher Tom Gordon. Lonely, frightened, starving, and cold, Gordon becomes Trisha's imaginary companion - and the key to her survival against an unidentified someone (or some thing) leaving death and destruction in its wake.