VIDEOS: There have already been five immaculate innings in 2014
On Saturday night, Rex Brothers became the fifth pitcher to strike out the side on nine pitches this season.
Even though strikeouts continue to rise throughout baseball -- MLB has set a new record high strikeout rate in each of the last six seasons and is on pace to do it again this year -- striking out the side on nine pitches is exceedingly rare. It's only happened 76 times since 1889.
Justin Masterson of the Indians fanned the side on nine pitches two days before Richards:
Boxberger's immaculate inning is clearly the most impressive of the five. He inherited a bases-loaded, no outs situation and struck out the side on the minimum number of pitches.