As part of Players Weekend, big leaguers will get to use unique spikes, batting gloves, sleeves, wristbands, catcher's masks and bats. Players will also wear uniquely designed caps and socks from Stance. During pregame workouts and postgame interviews, players will wear shirts honoring the charity of their choice.

Each jersey will have a special patch on the sleeve to mark the name of a person or people who were critical in the player's progression to the Majors.

Astros All-Star second baseman and American League MVP candidate Jose Altuve said he appreciates MLB's initiative to allow the players to show their creativity and interact with the fans.

"I think it's fun," Altuve said. "People are going to like that, going to get to know players' nicknames and have fun. Everything we can do to make the fans more interested in us and in baseball, we have to do."

The first teams to wear the special uniforms will be the Pirates and Cardinals during the MLB Little League Classic in Williamsport, Pa., on Aug. 20 during the Little League World Series.

• Altuve: "TUVE"
• Devenski: "DEVO THE DRAGON"
Carlos Beltran: "IVAN"
 Ken Giles: "100 MILES GILES"
Alex Bregman: "A-BREG"
 Jake Marisnick: "BIG FUDGE"
Marwin Gonzalez: "MARGO"
 Collin McHugh: "SNAP DRAGON 2"
Josh Reddick: "RED DAWG"
 Yuli Gurriel: "EL YULI"