Some New York Mets players have hesitated to get vaccinated against the coronavirus, causing the team to set up education efforts.

Major League Baseball and the players’ association said in a March 29 memorandum to players that COVID-19 protocols such as mask use and restrictions on movement and gathering would be relaxed once 85% of major league players and primary field staff on a team are vaccinated against the coronavirus.

Players on several teams started to get the vaccine last week during the final week of spring training, when they became eligible.

“There has been some hesitation on the part of some players, and that is why we’ve set up the education,” Mets president Sandy Alderson said Monday.

Alderson said the Mets want to get as many players vaccinated as possible.

“I think that’s in the best interest of the team,” he said. “It’s in the best interest of their families. It’s in the best interests of those who work with the players. So I hope that in addition to their own, personal medical considerations, that they take all of those things into consideration, as well. We’re hopeful they will.”

The Milwaukee Brewers announced Monday the team received the COVID-19 vaccine over the weekend but wouldn’t disclose what percentage of players and staffers participated.

Major League Baseball has announced it would relax protocols for teams that had 85% of their players and primary field staff vaccinated. Brewers president of baseball operations David Stearns declined to say whether the Brewers had reached that 85% threshold.

Stearns did say the Brewers who participated received the one-dose Johnson & Johnson vaccine.

The Brewers also put out a public service announcement Monday promoting COVID-19 vaccination. The release of the video coincided with the first day that Wisconsin made vaccination available to everyone 16 and older.

The video features star outfielder and 2018 NL MVP Christian Yelich as well as pitchers Freddy Peralta and Brent Suter. During a Monday Zoom session with reporters, Suter noted that he and his wife had tested positive a couple of months ago.