No. 20, SS Jean Segura*: Rated as the second-best prospect in the Angels' system by MLB.com, the 21-year-old was limited to just 52 Minor League games in 2011 because of hamstring issues he thinks have been resolved. Segura is believed to have matured as a hitter, boasts a quick, compact swing, has great arm strength and is an above-average runner. This year, the converted second baseman needs to keep getting used to shortstop and, most of all, stay healthy.
No. 35, 3B Luis Jimenez*: The 24-year-old played a full season of Double-A last year, batting .290 with 18 homers, 94 RBIs and 15 stolen bases. Jimenez has good plate coverage, but he's a free swinger and his range is suspect.
No. 49, RHP John Hellweg*: Listed at 6-foot-9 and 210 pounds, the wiry righty took big steps forward after being converted to a starting pitcher last year, posting a 2.12 ERA and an 80-24 strikeout-to-walk ratio in 14 starts for Class A Inland Empire. Hellweg, ranked ninth in the Angels' system, features a lively, upper-90s fastball and a low-80s slider with good break. He should pitch his first season of Double-A this year.
No. 52, RHP Fabio Martinez Mesa*: The 2011 season was a lost one for the 22-year-old, who spent most of it on the disabled list trying to regain strength in his shoulder and missing time with an ankle injury due to a comebacker. When healthy, Martinez -- ranked 13th -- throws a hard fastball that tops out at 98 mph, couples it with a nasty slider and strikes out a ton of hitters.
No. 56, RHP Ariel Pena*: The 22-year-old has spent three years in rookie ball and has pitched just four innings above Class A in his five pro seasons. In 2011, Pena -- who throws a hard four-seamer, slider and sinker -- posted a 4.45 ERA, 180 strikeouts and 81 walks for Inland Empire. Listed at 6-foot-3 and 190 pounds, scouts believe he'll have to cut down his walks to remain a starter.
No. 65, RHP Loek Van Mil: At 7-foot-1, Van Mil is the tallest pitcher in professional baseball. But the 27-year-old hasn't been able to use that height to get him to the Majors in six pro seasons. Van Mil posted a 2.04 ERA in 66 innings in Double-A last year, but was outrighted to the Minors in November before going unselected in the Rule 5 Draft.
No. 77, OF Kole Calhoun: Calhoun -- a lefty hitter who has spent time at all three outfield spots and first base in his two pro seasons -- hit .324 with 22 homers and 99 RBIs for Inland Empire in 2011. Calhoun, according to "Baseball America," is regarded more "for his blue-collar approach, plate discipline and professionalism" than his raw tools. MLB.com ranks him 15th in the Angels' system.
No. 78, 2B Taylor Lindsey: The 20-year-old lefty hitter was taken 37th overall out of high school in 2010 and won Rookie-level Pioneer League MVP honors in 2011, batting .362 with nine homers, 46 RBIs and 10 stolen bases. Lindsey, ranked sixth in the Angels' system, is a very mature hitter who projects to hit for a high average, but is limited with his arm strength and speed.
No. 81, RHP Daniel Tillman: The Angels tinkered with stretching Tillman out as a starter last year -- he posted a 3.09 ERA in five turns -- but returned him to the bullpen because they felt his stuff profiled better as a closer. Tillman throws a 92-95 mph fastball with good sink and a 78-80 mph slider. After being returned to the 'pen in May, the 22-year-old posted a 2.52 ERA in the Midwest, California and Arizona Fall leagues.
No. 87, LHP Matt Meyer: The 27-year-old may not be much of a prospect -- he's been with three different organizations and hasn't reached the Majors after six pro seasons -- but he has a deceptive sidearm delivery that could make him tough on lefty hitters. Meyer, who pitched in Saturday's intrasquad game, was limited to just 14 appearances for Triple-A Salt Lake last year, posting a 2.30 ERA and a 1.66 WHIP.