MINNEAPOLIS -- The nickname was given to Brewers left-hander Josh Hader when he was a sophomore in high school, though by now, he's forgotten who originally gave him the tag, or even the meaning behind it.
• Players Weekend gear available at MLBShop.com
But during the inaugural Players Weekend from Aug. 25-27, Hader will showcase his unique nickname to the world. The Maryland native will have "Haderade" etched on the back of his jersey for the Interleague series at Dodger Stadium.
"It's just a nickname that has stuck with me since high school," Hader said. "It's pretty cool to have some nicknames on the back, and I guess you can act like a kid."
MLB and the MLB Players Association are introducing Players Weekend, when all players will wear colorful, non-traditional uniforms featuring alternate designs. They will have the opportunity to have a nickname placed on the back of the jerseys made by Majestic Athletic.
In addition, players will wear uniquely colored and designed spikes, batting gloves, wristbands, compression sleeves, catcher's masks and bats.

Eric Thames, who will be wearing " SANG NAMJA," or "real man" in Korean, said that Hader's choice may be tough to beat.
"That's pretty good," Thames said. "I'm sure throughout his life, with how hard he throws, people always hate facing him. I can see that."
Game-worn, Players Weekend jerseys will be auctioned at MLB.com/auctions with 100 percent of net proceeds donated to the MLB-MLBPA Youth Development Foundation, a joint effort established in July 2015 by MLB and the MLBPA with an initial commitment of $30 million focused on improving the caliber, effectiveness and availability of amateur baseball and softball programs across the U.S. and Canada.
Each player will also wear a special patch on his sleeve showing the progression of a child evolving into a Major Leaguer. Under that logo is white space, and every player will mark a name of a person who they are grateful for in helping them advance their careers, such as a family member or a coach.
Thames, who plans to dedicate his patch to his mom and dad, is especially looking forward to this aspect of the jersey.
"Without these people, I wouldn't be playing baseball," Thames said. "I'd probably be doing another job, or some boring thing. They gave me the courage to pursue my dream. Me and these guys, we are all here for that reason."
The uniforms will first be worn by the Pirates and Cardinals during the MLB Little League Classic to be played in Williamsport, Pa., on Sunday, August 20, during the 2017 Little League World Series. That game will take place at Bowman Field, home of the Williamsport Crosscutters, a Phillies affiliate in the Short-Season Class A New York-Penn League.
Here's a list of nicknames that some Brewers are expected to sport on the back of their jerseys on Players Weekend:
• Ryan Braun: "OCHO"
• Travis Shaw: "MAYOR-DDC"
• Jimmy Nelson: "BIG SWEAT"
• Keon Broxton: "FLA BOY"
• Orlando Arcia: "EL NIÑO"
• Eric Sogard: "NERD POWER"
• Corey Knebel: "BIRD DOG"
• Domingo Santana: "SHOWMINGO"
• Matt Garza: "THE COUNT"
• Manny Pina: "PINEAPPLE"