On Aug 6, 2011, ESPN reported that MLB players have been issued a warning regarding use of Deer Antler spray administered under the tongue. Deer-Antler spray contains "potentially contaminated nutritional supplements" along with IGF-1 (Insulin Growth Factor) which players have used in the past as an alternative to steroids, especially given it can't be detected in urine samples (only blood testing). What's with Deer-Antler spray specifically? Scientists discovered IGF…