On February 23, 2010 — Major League Baseball announces that it will begin testing minor leaguers for human growth hormone this season. The illegal performance-enhancing substance has long been considered undetectable by conventional doping tests, but its presence has recently been isolated through a blood test, which will be used for this purpose.
Source:
Baseball Reference February 23
SABR Games Project
National Pastime February 23
Hall of Fame
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Retro Sheet
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