I believe you have to do it from the website. If you log in to your account through the ticket office website and click on the particular game, you get a screen like this:
Click the transfer tickets button and you’re on your way. I’ve never been through the entire process, but I assume it should be easy after that. You might also be able to print the tickets and hand deliver them to friends or family.
I have three tickets for Saturday and I cannot attend. If someone has friends that want to go and you have an account where I can transfer these tickets, they’re yours.