Added to the Rays' roster were shortstops Tim Beckham and Hak-Ju Lee and left-handed pitchers Felipe Rivero and Enny Romero.
Beckham, 22, spent the 2012 season at Triple-A Durham and hit .256 with six home runs, 28 RBIs and six stolen bases in 72 games. After the season, he was ranked as the Rays' No. 20 overall prospect.
The Griffin, Ga., native was drafted No. 1 overall in the 2008 First-Year Player Draft and has hit .264 over five Minor League seasons.
Lee, 22, finished his second season in the Rays' organization batting .261 with four home runs, 10 triples, 37 RBIs and 37 stolen bases over 116 games for Double-A Montgomery.
Following the 2012 season, the Korean shortstop was named the Best Baserunner in the organization by the Rays' baseball operations staff and ranked as their No. 1 overall prospect.
Lee was acquired by the Rays after the 2010 season as part of a five-player trade with the Cubs that included Matt Garza. Over four Minor League seasons, he has hit .287 with 127 stolen bases.
Rivero, 21, went 8-8 with a 3.41 ERA in 27 appearances (21 starts) at Class A Bowling Green in 2012. He represented the World Team in the XM Futures Game at Kansas City's Kauffman Stadium in July. The left-hander, who is the Rays' No. 10 overall prospect, has a career 3.47 ERA over four Minor League seasons.
Romero, 21, posted a 5-7 record with a 3.93 ERA over 25 appearances (23 starts) at Class A Charlotte in 2012. The southpaw was teammates with Rivero on the World Team in the XM Futures Game and is ranked as the No. 5 prospect in the Rays' organization. He has a career 3.67 ERA and 376 strikeouts in 370 innings pitched over five Minor League seasons.
Bill Chastain is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.