All 30 Major League teams will wear Marjory Stoneman Douglas High School baseball caps before their Spring Training games this weekend to show support for the Parkland, Fla., community and the Stoneman Douglas student body after the tragic shooting at the school on Feb. 14.
Players across MLB will then be signing the caps and auctioning them to raise money for the Broward Education Foundation, which will benefit the official Stoneman Douglas Victims' Fund. Seventeen people were killed in the shooting, including 14 students and three staff members.

"It's a tragedy. It was a tragedy that hit the state of Florida, where we have two teams, but obviously has very specific baseball connections," Commissioner Rob Manfred said. "Really a very strong sentiment among the clubs that this was the appropriate thing to do immediately."
MLB teams will wear the caps pregame on Friday and will also be allowed to wear them during their games. Since they're off on Friday, the Royals and Rangers will don the hats on Saturday.
The Commissioner approved the use of the caps during all games on Friday, the Spring Training openers for most of the clubs.

The effort started with a few Grapefruit League teams, which wanted to wear the caps pregame, and it quickly spread across camps in Florida and Arizona. Soon all 30 teams had decided to join in the support and fundraising effort for the school community.
Cubs first baseman Anthony Rizzo attended Stoneman Douglas, and spoke at a prayer vigil at Pine Trails Park the day after the shooting. 
"It was the hardest thing I've ever had to do," Rizzo said Monday about meeting with families of the victims of the shooting. "You don't know what to say, there's nothing you can say. When people get shot, you're grateful they're alive. When they pass away, you're grateful you knew them. Just to see how real it is, it's sad and it's why I'm so proud of what they're doing back in Parkland and how everyone is coming together. They're going to turn this tragedy into something positive.
"The caps made for the fundraising effort will be provided to all players, coaches and umpires."
The Stoneman Douglas High School caps are reminiscent of how the Mets wore NYPD and FDNY caps following the Sept. 11 terrorist attacks in 2001. The Mets donned the caps to honor the first responders in their first game after the attacks, in Pittsburgh on Sept. 17, and again in their return to New York four days later. In that memorable game at Shea Stadium, Mike Piazza hit the go-ahead home run in the eighth inning to lead the Mets to an emotional win over the Braves.