Episode 32 of "Ghost Whisperer"
s02e10 Giving Up The Ghost

Melinda tries to help a young baseball pitcher reject an angry ghost who wants to take over his body during a critical game. Melinda encounters the angry ghost, Matt, a former pro-baseball player who crashed and burned and died in a car accident, when he tries to take over the body of a Justin Cotter, a young pitcher, during a high school ballgame. Justin is scared and confused and not aware of the battle taking place inside him. Melinda must show Justin what is happening to him and help the boy to turn his back on the powerful spirit.