The wait is over: Stephen Strasburg will make his MLB debut on Tuesday against the Pittsburgh Pirates.

Said to be made from the rib of Nolan Ryan, the 21-year-old Washington Nationals right-hander is already the stuff of legend (or at least 2010 hype), even though his 100 mph fastball has yet to cross a major league plate.

So what should we expect?

Will Strasburg be lights-out, or will he go the way of David Clyde, the top pick in the 1973 draft who finished his short career with only 18 wins and a 4.63 ERA?

Here is a list of other past and present top pitching prospects and their major league accomplishments and failures.

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