Interestingly, in doing my research I found articles with wildly disparate numbers of mass shootings including one that claimed there had been 183 this year city the Washington Post which has their own database.
This appears to be comprehensive source of info going back several years. It does not include non gun deaths.
https://www.gunviolencearchive.org/query/b1954401-8065-4dd1-b726-60f48f5d743b