Wrigley Field historical sleuthing: Nolan Ryan edition

Al Yellon created Bleed Cubbie Blue and has been its managing editor since 2005. He's also written three books about the Cubs, the latest is "Chicago Cubs Firsts."

As always, here’s the full photo so you can have a closer look:

Nolan Ryan played for the Astros from 1980-88, but we can narrow this down further. The message board underneath the main scoreboard was installed in 1982 by Tribune Company when they bought the team. And to the left of the message board, you can see the soccer clock that was used for Chicago Sting games.