On September 19, I wrote about highly competitive games in MLB the night before. here and the same battles occurred last night. Detroit won a 5-4 game versus Seattle, Cleveland beat Houston in eleven innings, 2-1. San Francisco beat the Mets 2-1, LAD beat the Diamondbacks 7-6, Washington beat the Marlins 3-2 and Colorado beat the Cardinals 7-6 in fifteen innings.  There were other games, but these were the notable one run and extra-innings games that show the intensity of the last month of the season.  
Of particular note are the San Francisco and Colorado victories where both teams are trying to avoid last place and the ignominy that goes with that. See here for a discussion of teams and pride.