Wikipedia
Issues with the turf
“The stadium has had repeated problems with the grass surface, including the grass collapsing under Baltimore Ravens kicker Justin Tucker during a week 6 game in 2015. This has led to concern that the stadium wasn’t of a high enough caliber to host a high stakes game such as the Super Bowl. The problems with the turf were mentioned the day after the Super Bowl by Denver Broncos cornerback Aqib Talib who said “The footing on the field was terrible. San Fran (the 49ers) has to play eight games on that field, so they better do something to get it fixed. It was terrible.”
Rain forecast, and gusts of wind to 40mph.