17 | Catcher | Fountain Valley, Calif.
ACHIEVEMENTS: In March, Jeremy helped the Mater Dei Monarchs to USA Baseball's inaugural High School Invitational title, batting .538 in four games; for the 2012 season he hit .388 with 18 RBIs. Named the No. 1 player in the class of 2013 by ESPN, he was a member of last year's USA 18U National Team, which won a gold medal at the Pan-Am Games.
FIRST STEPS: Growing up, Jeremy played for the O.C. Juice, a travel team managed by his father, Joey. "I told him that natural ability would take you to one level, but that work ethic would take you to another," says Joey. "He's really taken that to heart."
EVOKES: Pudge Rodriguez, behind the plate, and Albert Pujols, with his batting stance. Mater Dei head coach Burt Call also sees another comparison. "Yadier Molina is an elite defensive catcher with a plus bat, and Jeremy has all the tools to develop into a similar player."
COACH'S COMMENT: "His baseball instincts are off the charts," says Call. "When he's catching, he can anticipate plays before they happen. At the plate he's very disciplined, and it seems like the tougher the pitcher, the more success he has."
WHAT'S NEXT: Jeremy is competing for a spot on the 18U National Team for the world championships in South Korea in August. He verbally committed to USC at the end of his freshman year but is expected to be taken in the early rounds of the 2013 MLB draft.
16 | Snowboarding | Steamboat Springs, Colo.
ACHIEVEMENTS: Arielle won silver in the halfpipe and slopestyle events at the inaugural Winter Youth Olympics in Austria in January and followed that with gold in the halfpipe at the junior world championships in Spain in March.
FIRST STEPS: She first hit the slopes on skis at age three but soon wanted a bigger challenge. "It wasn't good enough just to get down the mountain, she always wanted to find the jumps," says her dad, Ken.