As Tigers fans crowd Comerica Park this week, you'll likely see an increase in police and first responders around the stadium and downtown.

Fifth Third Bancorp announced Monday it will acquire Comerica Inc. in an all-stock deal valued at $10.9 billion, merging two major regional banks into what will become the nation’s ninth-largest bank, with roughly $288 billion in assets.

Comerica Bank, founded as the Detroit Savings Fund in the 1800s and headquartered in Detroit until moving to Dallas in 2007, has held the naming rights of the Tigers' stadium, Comerica Park, since it opened in 2000. That deal marked the first stadium naming rights in franchise history.