Tuesday was around 700k. Ill see if I can find the article I found it in. Not out of the question to see 1.5 million viewers a night in September if the club is in a pennant race.
Edit: https://ca.sports.yahoo.com/blogs/eh-game/great-canadian-ratings-report-jays-summer-stirring-interest-222905564.html
"Tuesday's game against first-place Baltimore continued that trend, drawing an average of 700,000 viewers -- basically what the average CFL game drew last year."