During his 8 no-decisions in 9-starts span, Harvey has posted a 2.66 ERA which is historical. Here's how ESPN via the Elias Sports Bureau summarized it:
Matt Harvey started Saturday's game, and allowed one run over seven innings before leaving with an injury. While Harvey kept his record intact - he has not been the losing pitcher in any of his 13 starts this season - Saturday's game marked the eighth time in his last nine starts that he had no decision. Harvey's sequence marks the 29th time in major-league history that a starting pitcher has reached no decision eight times within a span of nine straight starts within one season (with no relief appearances during that streak); that was most recently done by Roy Oswalt four years ago. But Harvey's 2.66 ERA over those nine starts is by far the lowest in any of those 29 sequences; the previous low was a 3.07 ERA by Cincinnati's Erik Hanson from June 12 to July 28 in 1994. (Like Harvey, Hanson was 1-0 with eight no-decisions over that span.)
The fact that the Mets rank 25th in the major leagues in runs scored is (most definitely) a detriment as to how good Harvey really is. What a shame!