The best players in Major League Baseball, the superstars, are the ones we expect to be great year in and year out, and for that matter, month in and month out.
That's not always the case. Some were slow starters, while others came out of nowhere and had a great April. That month is done, though, and with the end of May upon us, it's time to look back and see how everyone did.
Here are grades for every top-50 star for May. Players who didn't play, such as Mariano Rivera and Jacoby Ellsbury, are, of course, not on the list.