A spreadsheet containing the personal information of New York Yankees’ season ticket holders was inadvertently emailed on Monday evening to more than 1,000 people.

How many victims? 17,000 ticket holders.

What type of personal information? Names, addresses, phone numbers and email addresses of “non-premium” season ticket holders. The spreadsheet also contained Yankee account numbers and seat assignments. No financial data or Social Security numbers were compromised.

What happened? An employee working in the club’s ticketing department meant to send an attachment with newsletter information to Yankees season ticket licensees. Instead, the individual mistakenly attached the internal spreadsheet.

Details: Premium account holders, some of which are celebrities, were not affected. Less than half of all season ticket holders were impacted.

Quote: “A mistake was made and we’re being as transparent as we possibly can be,” a team spokesman said. “We’ve already taken steps to be sure it cannot and will not happen again.”

What was the response? The team has notified affected individuals by letter.

Source: NYDailyNews.com, “Yankees mistakenly email personal information, account numbers of ticket holders to over 1,000,” April 28, 2011.