It might be cold, rainy, and I am in a suit...but Wrigley is a calling

Friend: What are you doing at 1:20?
Me: I'll be at work
Friend: You are calling in sick.
Me: I'm already in the office.
Friend: You're leaving.
Me: Ok. Can I give my boss a reason?
Friend: Cubs Game. Sixth Row. Behind Home.
Me: Sounds like I'm getting sick