Adam Greenberg was excited. It was July 9, 2005, and the Chicago Cubs had just called him up to the big leagues. They were in Miami facing the Florida Marlins.

Greenberg's entire family flew down to Florida from Connecticut to watch his first major league series. They could barely contain their excitement in the 7th inning of the game, when Adam was called on to pinch hit for Cubs pitcher Will Ohman. The pitcher was Valerio De Los Santos, a left-hander.

"I get in the box," Greenberg remembers, "and all of a sudden he throws it, and I'm thinking, 'Am I swinging?' and all of a sudden, bam."

One pitch.

Here's the way New York Times reporter Ira Berkow described the only pitch of Greenberg's major league career:

"No one imagined that the very first pitch the left-handed Greenberg faced in the major leagues would be a fastball that would crack him squarely in the head, smashing against his helmet and the part of his neck just under his right ear, making a sound so loud that it stunned the crowd of almost 23,000.

His parents, his sister and two brothers had come to Dolphins Stadium from Guilford, Conn., near New Haven. His grandfather was watching at home on television.

His mother, Wendy Greenberg, said she was horrified when she saw her son drop to the ground as Cubs Manager Dusty Baker and the trainer rushed to the plate."

Greenberg had to be removed from the game and was placed on the disabled list after the game. He never returned to the Cubs, and still hasn't returned to the majors, although he did recover eventually.

ESPN "Outside the Lines" did a feature on him. This aired in 2007.

In 2008 he played in the Angels farm system (AA), and hit .271, but he hasn't yet come close to returning to the majors. This year (2009) he is playing in the Cincinnati Reds chain.

If he doesn't make it back, his major league career will consist of one extremely uncomfortable pitch.

On the other hand, his lifetime career on-base percentage will always be a perfect 1.000.