Let's dive into the numbers for all 30 MLB teams, with a focus on specific narratives around the St. Louis Cardinals, Toronto Blue Jays, Colorado Rockies and Pittsburgh Pirates. Average MLB attendance numbers for every teamHere is the average home attendance for every MLB team, per ESPN. Team Average Home Attendance 1. St. Louis' abysmal 2025 campaign was a real low point — and the ballpark environment hasn't really recovered yet. Blue Jays fans came earlier in the season with hopes of watching a contender take the next step.