This year, they listened to an hourlong presentation from the meteorologist Craig Edwards, a game-day adviser for the Minnesota Twins, who urged his audience to remember that “storms are not solid state.”

“Weather is dynamic, it changes, it develops,” he said, not trying to be too ominous.

One of those who was listening was Heather Nabozny, the head groundskeeper for the Detroit Tigers and the first woman to hold the position in the major leagues. She said the unexpected arrival of rain tormented her because if the clay infield at Comerica Park is left uncovered and gets too wet from an unexpected downpour, the field becomes unplayable.

“I’ve woken up numerous times when there’s thunder or lightning and I hear rain on my roof,” she said. Only after she sits up in bed, she said, does she mentally flip through the schedule and remember that the Tigers are on the road and that “Phew, there’s no game today.”

She added, “Weather is probably my biggest headache because it’s so unpredictable.”

If it is not the weather, it is the music fans. Last summer’s U2 concert tour was a big topic at the convention because the Oakland Athletics, the St. Louis Cardinals, the Florida Marlins and the Los Angeles Angels had each served as a host for at least one show. The production and stage design was massive and groundskeepers went to great lengths to protect their turf, even it meant removing some of it ahead of time.

“Worst month of my life,” joked Barney Lopas, the Angels’ head groundskeeper.

“It’s a concert tour that blows all other concert tours away,” said Billy Findley, the head groundskeeper for the Cardinals. “We had to basically resod the whole field after the concert. But we got through it.”

Groundskeepers do not step off the pitching rubber over and over again or endlessly readjust their batting gloves, so it was somewhat surprising they were confronted at the convention with the issue of how to keep games moving along.