MLB Ballpark Beer Guide

Oriole Park at Camden Yards
"Nothing pairs better with baseball—and its wild and weird stadium foods—than an ice-cold beer. But gone are the days of light lagers and limited choices. Major League Baseball’s ballparks offer an extensive list of draft and packaged beers, from big-brand standbys to hyper-local breweries and ballpark-only brews. ... With so many choices, its understandable if you’re undecided on what to sip on for nine innings. Luckily, whether you’re in search of a bargain brew or a craft beer from a local brewery, we’ve got you covered. Ahead of the 2019 season, Sports Illustrated reached out to all 30 MLB teams to find out details on each ballpark’s beer offerings. ..."
SI
Craft Beer Line-Ups at All 30 MLB Stadiums (2015)
Comparing Beer, Hot Dog, and Ticket Prices at Major League Baseball Parks

Schaefer Beer and the Brooklyn Dodgers.
The Glory Days of Baseball and Beer Marketing
"Beer has been closely associated with professional baseball since the game’s earliest days, but it was not initially a marriage welcomed by owners. In fact, the National League once expelled teams for selling beer at the ballpark. But over the years that relationship changed, and over time baseball became a prime marketing tool for breweries. Here are some notable examples. ... And what better way to reach a mass market of beer drinkers in the 1950s and 1960s than through sponsorship of baseball games? Some brewery owners even went to the point of buying baseball teams. ..."
The Glory Days of Baseball and Beer Marketing