Philadelphia Phillies pitcher Roy Halladay threw a perfect game against the Florida Marlins on Saturday. It's the 20th perfect game in MLB history, and the second perfect game this month (Dallas Braden threw one against Tampa Bay on May 9th). The last time there were two perfect games in the same season was 1880! And don't forget that Rockies ace Ubaldo Jimenez also threw a no hitter this year.

Did you know Cy Young threw a perfect game in 1904?

Do you think there will be a third perfect game this year? Who do you think will throw the next perfect game?