This is the drill we ran all through high school. It is the most time effective and skill intensive way to warm up a team, but your boys must be able to play catch! Fungo-ers stand in the "fungoe circles" that any good field has (and if it doesn't, you know where they're supposed to be - just outside of the home-plate dirt circle, towards the dugouts). The catch to this method is this - you have two first basemen, allowing both sides of the infield to throw across. Herein lies the only danger - one of the firstbasemen has a lengthy throw back to a shagger, so caution must be excersized (a catcher with a good head on his shoulders really helps).
Alright, let’s get to the drill. “Fungo Baseball/Softball” is a great drill for fielding and base running. It’s the same as playing an inter-squad scrimmage, except the pitchers do not throw live, and the hitters toss the ball to themselves and hit fungoes where they want. It is set up as a competitive game with an endless amount of teaching points. I really like to do this drill early in the season in order to simulate some real game like situations, and also when you’re on a hot streak and you’re looking to keep your team sharp on the little things like relays, backing up, and communication.