Joe Mauer knew there were some ballparks where fans would be tougher to play in front of than others. The former American League Most Valuable Player specifically put Yankee Stadium, Fenway Park and Guaranteed Rate Field in Chicago in that group.
"There are some hostile environments," he said.
Mauer also mentioned day games in Oakland, where there could be just a few thousand fans in attendance. Those days, a player could hear everything that was said, so maintaining focus was a different challenge.
Most of the abuse was verbal. Mauer said he didn't have objects thrown at him very often during his 15-year career.