San Francisco 49ers owner Jed York wrote an open letter to fans Thursday.York thanked fans for their support in the 2013 season that ended Sunday in a last-second loss at rival Seattle in the NFC Championship Game. York did express enthusiasm for the program moving forward, highlighted by the opening of Levi's Stadium in Santa Clara this year.Here is the letter, which was released by the team: Dear Faithful,On behalf of my family and the entire 49ers organization, I want to thank you, our Faithful fans for your unwavering passion and support.