By now you know that Jim Harbaugh – the head coach of the Los Angeles Chargers – and John Harbaugh (his counterpart who manages the Baltimore Ravens) are brothers.

You knew that, right? They have supported each other throughout their careers, and now that Jim is back in the NFL, their teams are playing each other again, just like they did in Super Bowl 47.

With all of this history and family ties, it’s a good time to answer all your questions about the Harbaugh brothers. Here are some questions with answers you may need to know:

How old are Jim and John Harbaugh? Who is the older Harbaugh brother?

John is 15 months older – he is 62 years old. Jim is 60.

What is the Harbaughs’ record against each other?

John has a 2-0 lead over Jim. The Ravens defeated Jim’s 49ers in 2011 and in the aforementioned Super Bowl matchup in 2013.

Which players played for both Harbaughs?

A partial list:

1. JK Dobbins

2. Gus Edwards

3. Kyle Van Noy

4. David Ojabo

5. Josh Johnson

6. Tavares Gooden

7. Bradley Bozeman

8. Hayden Hurst

Did John Harbaugh play in the NFL?

No. He played in college for Miami (Ohio).

Did Jim Harbaugh play in the NFL?

Surely. He was a quarterback for 14 years, with stints with the Bears, Colts, Ravens and Chargers.