Scout

Born and raised in Boston, Massachusetts, the Scout is a fast running scrapper with a baseball bat and a snarky 'in-your-face' attitude. He is very rude, and seems to think he can handle anything. He often acts a lot tougher than he can actually prove to be, though he's certainly not weak.

He is the fastest mercenary on the battlefield. His Double Jump leaves slower opponents struggling to keep up and helps him navigate the terrain and dodge oncoming projectiles. Carrying a Scattergun, a Pistol, and a Bat, the Scout is ideal for aggressive fighting and flanking. The Scout is a good class for quick hit and run tactics for sapping away the enemies' health due to his ability to get in, do damage and dash away before even being noticed.

The Scout is an excellent choice for completing objectives quickly. He can capture control points and push carts at the rate of 2 players. His speed makes him a natural for capturing the Intelligence; his double jump allows him to carry it along unexpected paths.

~ Via wiki.teamfortress.com