OF Age: 23
Raw and extremely talented, he hit 19 home runs in 104 mesmerizing games after being called up last June, and finished second in NL Rookie of the Year voting.
OF Age: 26
Speed freak: He stole 36 bases in 2013, his first full season.
AROLDIS CHAPMAN (L)
LHP Age: 26
BRAYAN PENA (R)
C Age: 32
The closer, who will miss the first month of the season after he was hit in the face by a line drive during spring training, tossed the fastest pitch on record: 105.1 mph in 2010. For the veteran Pena, the Reds are the fourth team of his 10-year career.
3. WHITE SOX
ALEXEI RAMIREZ (L)
SS Age: 32
DAYAN VICIEDO (C)
OF Age: 25
JOSE ABREU (R)
1B Age: 27
Ramirez has been Chicago's starting shortstop since 2009, while Viciedo (in his fifth season) and Abreu (a rookie) are part of a new wave.
OF Age: 28
His ferocious swing became a lineup fixture soon after he signed in 2012. In his first two seasons he hit 23 and 26 homers, respectively.
OF Age: 22
Since signing in 2012 he has risen to No. 41 on Baseball America's list of top 100 prospects.
SS Age: 24
He signed wth Toronto in 2010, was dealt to Miami in '12 and is now a top glove man.
Photographs by ROBERT BECK/SPORTS ILLUSTRATED
BILL FRAKES/SPORTS ILLUSTRATED (HECHAVARRIA)