Alex Rodriguez during a July 13 game in Florida, where he was playing for the minor league Tampa Yankees while trying to recover from recent injuries. Mike Carlson /Reuters /Landov hide caption

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Pitcher R.A. Dickey of the Toronto Blue Jays throws a knuckleball against the Tampa Bay Rays at Tropicana Field in St. Petersburg, Florida. J. Meric/Getty Images hide caption

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Dark clouds hang over Major League Baseball. There are reports that about 20 players may be suspended because of their connections to a Miami clinic that dispensed performance-enhancing drugs. (Photo taken Sunday at Yankee Stadium.) Jason Szenes /EPA /LANDOV hide caption

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Little League baseball players in New York, where donations have helped teams and leagues get the 2013 season started. Pitch In For Baseball hide caption

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Play Ball: Little Leaguers Get Assist From 'Pitch In' Charity

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Ouch! Carlos Quentin (left) of the San Diego Padres charged the mound Thursday after Los Angeles Dodgers pitcher Zack Greinke (right) hit him with a pitch. In the brawl, Greinke broke his left collarbone. Denis Poroy/Getty Images hide caption

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The Dominican Republic celebrates after beating the Netherlands 4-1 in Monday's semifinal game of the World Baseball Classic in San Francisco. Jeff Chiu/AP hide caption

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Puerto Rico's Alex Rios celebrated Sunday with teammates after hitting a two-run home run in the seventh inning against Japan in the semi-finals of the World Baseball Classic at AT&T Park in San Francisco. Terry Schmitt /UPI /Landov hide caption

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Tom Goldman reporting for the NPR Newscast

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Major League baseball will begin random regular-season blood tests for human growth hormone, seen here in an injector pen holding about one week's worth of HGH doses at the clinic of Dr. Mark Molitch of Northwestern University. M. Spencer Green/AP hide caption

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Craig Biggio of the Houston Astros led the 2013 Hall of Fame voting, but fell short of the 75 percent required for induction in Cooperstown. No players were chosen in the balloting. Justin Sullivan/Getty Images hide caption

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