The Chicago Cubs and Chicago White Sox hosted games in some unusual weather elements on Monday night. Rain delays are common throughout the MLB season, but very rarely does fog invade a city to the point where player safety comes into question.
The screenshot you see above is not one from a low quality camera or a broken lens. The reason you can hardly make out Cincinnati Reds left fielder Xavier Paul is because the fog was so thick as he camped under a fly ball that cameras nearly lost sight of him. The Reds won 6-2 at Wrigley Field in a game that was somehow not delayed. The White Sox defeated the Toronto Blue Jays 10-6, but their game was delayed for about an hour in the third.
Here is a video that shows how bad the fog in the Windy City got at certain points during the night: