Ballpark-related revenue for the New York Mets dropped $8.3 million this past season -- the third straight year of declines since Citi Field opened. "These numbers now illustrate the connection between revenue and the play on the field," said sports economist Joel Maxcy, an associate professor at Temple's School of Tourism and Hospitality Management. "Ultimately their performance on the field wasn't very good in the second half, which probably is a reason why they fell short of their projections."