How cold is too cold to practice pitching outside?

Damn, it's cold outside. So how cold is too cold to practice pitching outside?

My cutoff point is 25 to 30 degrees F. Any colder, and I feel it becomes too difficult for pitchers to keep their muscles warm in the practice setting, which increases risk of injury.

If you're a coach and you're dealing with cold weather this time of year, let your pitchers wear jackets in practice, especially if they're going to be standing around a lot.  But when your pitchers start throwing, have them take the jackets off.

Also, make sure your kids warm up properly -- with a jog and a good dynamic stretch -- before doing any throwing outside in cold temperatures. Build up a sweat before throwing -- and keep it up throughout the workout. That's the rule when throwing outside in the cold.

Lastly, encourage your pitchers to wear gloves and a wool cap to keep warm, when standing around. But, again, take them off when pitching -- because you can't pitch with them in a game.