Since 2012, there have been 13 no-hitters in Major League Baseball.
In fact the recent spike in no-no's can be traced back to 1990.
If you count from 1990, 23% of all no hitters (67 of them) have taken place in the last 24 years, or less than 17% of the life of major league baseball.
Also, in that span there have been three different seasons of seven no-hitters, 1991 and 2012, and another season with six, 2010.
Also since 1990, 11 of the 23 perfect games ever thrown in in the history of Major League baseball have happened since 1991.
This begs the question, on the heels of Lincecum's second no hitter in less than a calendar year, and the seeming rise in pitcher dominance, are no hitters becoming more of a regular occurrence?
Since 1990, that number has been equaled or surpassed in 12 different season, including his year, where there have already been three before the all-star break.
Also, when looking at the box scores, five of the 10 highest strikeout totals in MLB no hitter history, including Clayton Kershaw's record 15-strikeout no-no have happened since 1990.
A great deal of those strikeouts could be attributed to the rise in strikeouts in Major League Baseball.
In 1990, the American League averaged 5.7 strikeouts per game and 5.8 in the NL. Those numbers have jumped in 24 seasons to 7.7 per game in the AL this year and 7.8 per game in the NL.
With the strikeout and and swing and miss rates up its not a wonder that what has been a fairly random occurrence in Major League Baseball appears to be on the rise.
The strikeout rate has contributed to the higher dominant single pitching performances of the last 24 seasons, and are part of what's contributed to the spike in perfect games.
Regular no-hitters remain a fairly random occurrence, happening at about three and a half per season over that span, about the same as the whole of major league history, but it will be interesting to see if this trend of six or seven per year continues, and if teams deal with that any way.