The Letter "Y"

 At the conclusion of the 2011 MLB season the following players (first names starting with the letter Y) were on rosters across the various levels of each organization in MLB.

The players underlined have MLB service time (except Yu Darvish) while the others are minor-leaguers. The vast majority of these young players have minimal experience as they are mostly teenagers playing in the Dominican and Venezuelan Summer Leagues.

NL WEST 

Padres (8)

 Yonder Alonso (Padres) Cuba

Yoan Alcantara (Padres) Dominican Republic
Yimmi (Yoel) Brasoban (Padres) Dominican Republic
Yefri Carvajal (Padres) Dominican Republic
Yorky Diaz (Padres) Dominican Republic
Yair Lopez (Padres) Dominican Republic
Yasmani Grandal (Padres) Cuba

Yordany Ramirez (Padres) Dominican Republic

Giants (2)

Ydwin Villegas (Giants) Venezuela
Yeini Martinez (Giants) Dominican Republic

Dodgers (2)

Yimi Garcia (Dodgers) Dominican Republic

Yimy Queipe-Rodriguez (Dodgers) Cuba

Rockies (2)

Yonathan Daza (Rockies) Venezuela
Yafistel Roja (Rockies) Dominican Republic

D-Backs (6)

Yhency Brazoban (D-Backs) Dominican Republic
Yazy Arbelo (D-Backs) United States-Florida
Yorman Garcia (D-Backs) Venezuela
Yonata Ortega (D-Backs) Dominican Republic
Yosbel Gutierrez (D-Backs) Venezuela
Yefrey Ramirez (D-Backs) Dominican Republic

NL CENTRAL 

 Cubs (6)

Yaniel Cabezas (Cubs) Cuba
Yohan Gonzalez (Cubs) Dominican Republic
Yao-Lin Wang (Cubs) Taiwan
Yomar Morel (Cubs) Dominican Republic
Yoannis Negrin (Cubs) United States- Miami
Yilver Sanchez (Cubs) Dominican Republic

Cardinals (2)

Yadier Molina (Cardinals) Puerto Rico

Yunier Castillo (Cardinals) Dominican Republic

Pirates (9)

Yunior Aquiles (Pirates) Dominican Republic
Yunerky Adams (Pirates) Dominican Republic
Yhonathan Barrios (Pirates) Colombia
Yefaine Gerald (Pirates) Dominican Republic
Yunesky Sanchez (Pirates) Cuba
Yhonatan Herrand (Pirates) Dominican Republic
Yeffrey Jaquez (Pirates) Dominican Republic
Yunior Montero (Pirates) Dominican Republic
Yomifer Polanco (Pirates) Dominican Republic

Astros (6)

Yoiner Angulo (Astros) Colombia
Yoel Silfa (Astros)Dominican Republic
Ydarqui Marte (Astros) Dominican Republic
Yonquelys Martinez (Astros) Dominican Republic
Yonathan Mejia (Astros) Dominican Republic
Yeudy Perdomo (Houston) Dominican Republic

Brewers (6)

Yuniesky Betancourt (Brewers) Cuba
Yovani Gallardo (Brewers) Mexico

Yonki Hernandez (Brewers) Dominican Republic
Yheris Mateo (Brewers) Dominican Republic
Yancarlos Ortiz (Brewers) Dominican Republic
Yadiel Rivera (Brewers) Puerto Rico

Reds (3)

Yovan Gonzalez (Reds) Puerto Rico
Yimmy Lopez (Reds) Venezuela

Yorman Rodriguez (Reds) Venezuela

NL EAST

Mets (5)
Yohan Almonte (Mets) Dominican Republic
Yucarybert De La Cruz (Mets) Dominican Republic
Yunior Peroza (Mets) Venezuela
Yoryi Nuez (Mets) Dominican Republic
Yeixon Ruiz (Mets) Dominican Republic

Marlins (5)
Yeison Del Rosario (Marlins) Dominican Republic
Yeraldo Fermin (Marlins) Dominican Republic
Yeison Hernandez (Marlins) Dominican Republic
Yeims Mendoza (Marlins) Dominican Republic
Yefri Perez (Marlins) Dominican Republic

Braves (2)
 Yeliar Castro (Braves) Panama
 Yohan Flande (Braves) Dominican Republic

Nationals (3)
Yuniesky Maya (Nationals) Cuba
Yermin Mercedes (Nationals) Dominican Republic
Yunior Novoa (Nationals) Dominican Republic

Phillies (5)
Yari Sosa (Phillies) Dominican Republic
Yovan Silva (Phillies) Venezuela
Yeisson Morales (Phillies) Dominican Republic
Yan Olmo (Phillies) Dominican Republic
Yacksel Rios (Phillies) Puerto Rico

Total Players = 72
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AL WEST

Angels (0)
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A's (4)
Yordy Alejo (A's)Venezuela
Yordy Cabrera (A's) United States-Florida
Yusef Carter (A's) United States- New York
Yadel Marti (A's) Cuba

Seattle (5)
Yidid Batista (Mariners) Colombia
Yodi Calderon (Mariners) Venezuela
Yunior De Jesus (Mariners) Dominican Republic
Yeuri Gonzalez (Mariners) Dominican Republic
Yoervis Medina (Mariners) Venezuela

Texas (6)
Yu Darvish (Rangers) Japan
Yoshinori Tateyama (Rangers) Japan
Yorvit Torrealba (Rangers) Venezuela
Yefry Castillo (Rangers) Dominican Republic
Yoon-Hee Nam (Rangers) Korea
Yoshinori Tateyama (Rangers) Japan

AL CENTRAL

Cleveland (3)
Yunior De La Cruz (Indians) Dominican Republic
Yeiker Lovera (Indians) Venezuela
Yonathan Mendoza (Indians) Dominican Republic

Chicago (2) 
Yensi Magallanes (White Sox) Venezuela
(Yolmer) Carlos Sanchez (White Sox) Venezuela

Kansas City (10)
Yamaico Navarro (Royals) Dominican Republic
Yender Caramo (Royals) Venezuela
Yovany D'Amico (Royals) Venezuela
Yowill Espinal (Royals) Dominican Republic
Yunior Figueroa (Royals) Dominican Republic
Yem Prades (Royals) Cuba
Yamil Rios (Royals) Venezuela
Yerinson Tatis (Royals) Dominican Republic
Yordano Ventura (Royals) Dominican Republic
Ysmelin Alcantara (Royals) Dominican Republic

Detroit (5)
Yinio Calderon (Tigers) Dominican Republic
Yoel Espinal (Tigers) Dominican Republic
Yorfrank Lopez (Tigers) Venezuela
Yulman Ribeiro (Tigers) Venezuela
Yonny (Yoel) Mosquera (Tigers) Dominican Republic

Minnesota (3)
Yeison Florentino (Twins) Dominican Republic
Yorman Landa (Twins) Venezuela
Yangervis Solarte (Twins) Venezuela

AL EAST

Toronto (6)
Yunel Escobar (Blue Jays) Cuba
Yeico Aponte ( Blue Jays) Dominican Republic
Yeyfry Del Rosario (Blue Jays) Dominican Republic
Yan Gomes (Blue Jays) Brazil
Yudelmis Hernandez (Blue Jays) United States-New Jersey
Yohan Pino (Blue Jays) Venezuela

Baltimore (2)
Yorky Rojas (Orioles)Dominican Republic
Yancorix Adrian (Orioles) Dominican Republic

New York (4)
Yoely Bello (Yankees) Dominican Republic
Yeicok Caldeon (Yankees) Dominican Republic
Yadil Mujica (Yankees) Cuba
Yobanny Reyes (Yankees) Dominican Republic

Boston (1)
Ynoel Aguero (Red Sox) Dominican Republic

Tampa Bay (3)
Yomelbin Almonte (Rays) Dominican Republic
Yoel Araujo (Rays) Dominican Republic
Yerwin Sanchez (Rays) Venezuela

Total Players = 54
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Total "Y" Players with MLB teams and affiliates = 126
Dominican Republic = 71
Venezuela = 24
Cuba = 11
United States = 5
Puerto Rico = 4
Columbia = 3
Japan = 3
Brazil = 1
Korea =1
Mexico = 1
Panama =1
Taiwan =1

Total Players with MLB teams and affiliates = approximately 5475
(21 organizations x 7 teams* x 25 players) + (9 organizations x 8 teams x 25 players)

*Some teams have 2 teams in the Dominican Summer League (Cubs, Mets, Yankees) and a few teams play in the Venezuelan Summer League (Mariners, Phillies, Pirates, Rays, Reds, Tigers) as well. The math tells me that there are 21 organizations with 7 teams and 9 organizations with 8 teams. Most of these Foreign Rookie Summer League teams also have rosters larger than 25 players.

Due to a large participation in Latin America approximately 2% of the players affiliated with a Major League baseball team have a first name that starts with the letter "Y".