According to a bankrate.com article written in 2016 the average cost for a family of 4 to attend a giants game at metlife stadium (includes 4 tickets, parking and a beer for each) was $629 (and the beers back then were only $5 according to the article). Thats over $600 for family of 4 – $125+ per person. Thats the cost of attending an event, any event at metlife stadium, which according to forbes is one of the most expensive stadiums ever built.
@CTR. The cost to attend a baseball gave has risen 350+%, adjusted for inflation, in the last 30 years.