The Cubs have updated their team flag

On Opening Day 2017 at Wrigley Field, the Cubs unfurled four flags on new flagpoles that had been constructed in the center-field bleachers.

Three of them commemorated the team’s World Series titles in 1907, 1908 and 2016. The fourth was a pennant-style flag honoring the 2016 National League pennant. There wasn’t a clear photo I could find of this flag actually flying over Wrigley, but it looks like this:

This design was a homage to a flag created for the 1945 Cubs National League championship.