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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
|---|---|---|---|---|---|---|---|---|---|---|---|
| O'Day, Ron | SP | San Francisco Giants | 31 | 09/27/2003 | Denver | USA | Right | Right | 6' 3" | 210 lbs | $500,000 |
| O'Donnell, Jerry | 3B | Free Agent | 20 | 05/01/2015 | Sacramento | USA | Right | Right | 6' 1" | 190 lbs | - |
| O'Drom, Jared | C | Free Agent | 16 | 10/12/2018 | Portland | USA | Switch | Right | 6' 3" | 200 lbs | - |
| O'Fallon, Steve | SS | Oakland Athletics | 28 | 08/06/2006 | Bloomington | USA | Right | Right | 6' 3" | 200 lbs | $760,000 |
| O'Hanesian, Toby | CF | Cincinnati Reds | 27 | 12/20/2007 | Cicero | USA | Right | Right | 6' 2" | 200 lbs | $4,200,000 |
| O'Hanian, Dominic | SP | Free Agent | 18 | 08/01/2016 | Lake Elsinore | USA | Right | Right | 6' 4" | 185 lbs | - |
| O'Hora, Don | SP | Free Agent | 15 | 07/09/2019 | Shiprock | USA | Switch | Right | 6' 2" | 170 lbs | - |
| O'Keefe, Darrel | SP | Free Agent | 16 | 04/19/2019 | Colorado Springs | USA | Right | Left | 6' 1" | 160 lbs | - |
| O'Neil, Josh | C | Pittsburgh Pirates | 32 | 12/30/2002 | Collinsville | USA | Right | Right | 6' 0" | 200 lbs | $13,000,000 |
| O'Sullivan, Chris | 1B | Miami Marlins | 23 | 08/18/2011 | Oklahoma City | USA | Left | Left | 6' 3" | 195 lbs | $500,000 |
| Obenauer, Artie | SP | Free Agent | 15 | 08/27/2019 | San Jose | USA | Right | Right | 6' 1" | 160 lbs | - |
| Oberholzer, Rob | SP | Free Agent | 22 | 07/12/2012 | San Antonio | USA | Left | Right | 6' 4" | 205 lbs | - |
| Obermark, Deron | RF | Baltimore Orioles | 23 | 10/19/2011 | Osseo | USA | Right | Left | 6' 2" | 200 lbs | $500,000 |
| Ocampo, Jorge | CF | Free Agent | 21 | 02/15/2014 | Brooklyn | USA | Right | Right | 6' 0" | 185 lbs | - |
| Ochsner, Mike | C | Free Agent | 16 | 01/19/2019 | San Luis | USA | Right | Right | 6' 3" | 195 lbs | - |
| Oglethorpe, Nate | SP | Free Agent | 17 | 07/07/2017 | Washington | USA | Right | Right | 6' 0" | 165 lbs | - |
| Ogren, Joe | CF | Free Agent | 21 | 04/10/2014 | Arlington | USA | Left | Right | 6' 0" | 170 lbs | - |
| Ohashi, Yukihisa | RP | Milwaukee Brewers | 24 | 03/17/2011 | Matsuura | JPN | Left | Left | 6' 6" | 200 lbs | $500,000 |
| Ohrtman, Len | 2B | Free Agent | 17 | 09/26/2017 | Safety Harbor | USA | Right | Right | 6' 3" | 175 lbs | - |
| Ojeda, Aurelio | SS | Toronto Blue Jays | 18 | 07/27/2016 | Santo Domingo | DOM | Right | Right | 6' 1" | 170 lbs | - |
| Ojeda, José | 3B | Free Agent | 16 | 10/29/2018 | Bayamón | PUR | Right | Right | 6' 2" | 180 lbs | - |
| Okamura, Kobo | RP | Miami Marlins | 26 | 02/15/2009 | Zama | JPN | Right | Right | 6' 4" | 200 lbs | $500,000 |
| Okeson, Wes | SP | Free Agent | 20 | 03/02/2015 | Arlington | USA | Left | Left | 6' 2" | 180 lbs | - |
| Olave, António | SP | Free Agent | 18 | 05/13/2017 | Chicago | USA | Right | Right | 6' 1" | 160 lbs | - |
| Oldfield, Jim | SP | Free Agent | 20 | 02/11/2015 | Bolingbrook | USA | Right | Right | 6' 2" | 185 lbs | - |
| Olei, Elijah | SP | Free Agent | 20 | 11/26/2014 | New York | USA | Right | Right | 6' 5" | 205 lbs | - |
| Olivas, Arturo | C | New York Yankees | 17 | 09/23/2017 | Santo Domingo | DOM | Right | Right | 6' 4" | 205 lbs | - |
| Oliveira, César | C | Free Agent | 19 | 04/17/2016 | San Francisco de Macorís | DOM | Right | Right | 6' 0" | 185 lbs | - |
| Oliveira, José | SP | Minnesota Twins | 17 | 12/14/2017 | Santo Domingo | DOM | Right | Right | 5' 11" | 160 lbs | - |
| Olivieri, Enrico | SS | Las Vegas Rat Pack | 17 | 01/02/2018 | La Romana | DOM | Right | Right | 6' 2" | 180 lbs | - |
| Olivo, Mario | 2B | New York Mets | 18 | 03/30/2017 | Santo Domingo | DOM | Right | Right | 5' 10" | 165 lbs | - |
| Olvera, Arturo | CF | Free Agent | 16 | 06/26/2018 | Santo Domingo | DOM | Right | Right | 6' 1" | 175 lbs | - |
| Olvera, Edgardo | SP | St. Louis Cardinals | 18 | 05/30/2017 | La Romana | DOM | Right | Right | 6' 0" | 170 lbs | - |
| Ong, Toan | SP | Free Agent | 17 | 12/10/2017 | Thousand Oaks | USA | Left | Right | 6' 1" | 170 lbs | - |
| Onsrud, Rob | 2B | Free Agent | 17 | 09/30/2017 | Los Angeles | USA | Right | Right | 6' 2" | 175 lbs | - |
| Ontiveros, Arturo | SP | Houston Astros | 16 | 12/16/2018 | Cúa | VEN | Right | Right | 6' 0" | 170 lbs | - |
| Orbegoso, Jesús | SP | Boston Red Sox | 17 | 10/23/2017 | San Francisco de Macorís | DOM | Right | Right | 6' 2" | 180 lbs | - |
| Oritz, José | CF | Atlanta Braves | 17 | 09/27/2017 | Turmero | VEN | Right | Right | 6' 2" | 180 lbs | - |
| Ornelas, DeMario | RF | San Francisco Giants | 16 | 04/07/2019 | Santiago | DOM | Left | Left | 6' 2" | 180 lbs | - |
| Ornelas, Mario | SP | New York Mets | 19 | 05/28/2016 | El Limón | VEN | Right | Left | 6' 9" | 200 lbs | - |
| Orosco, Adrián | SP | Atlanta Braves | 18 | 02/24/2017 | Santo Domingo | DOM | Right | Right | 5' 9" | 160 lbs | - |
| Orosco, Juan | SP | St. Louis Cardinals | 16 | 07/01/2018 | La Romana | DOM | Switch | Right | 6' 3" | 175 lbs | - |
| Orosz, Steve | 3B | Free Agent | 16 | 08/26/2018 | Forestdale | USA | Right | Right | 6' 4" | 190 lbs | - |
| Orozco, Albert | SP | New Jersey Pioneers | 17 | 11/24/2017 | Santo Domingo | DOM | Left | Left | 6' 8" | 205 lbs | - |
| Orozco, Héctor | SP | Las Vegas Rat Pack | 17 | 09/20/2017 | Barahona | DOM | Right | Right | 6' 7" | 200 lbs | - |
| Orozco, Lúcio | CF | Arizona Diamondbacks | 26 | 03/26/2009 | Villa Bisonó | DOM | Right | Right | 6' 2" | 190 lbs | $650,000 |
| Ortbals, Sam | RP | Kansas City Royals | 26 | 07/04/2008 | San Antonio | USA | Right | Right | 6' 1" | 200 lbs | $500,000 |
| Ortega, Jesús | SP | St. Louis Cardinals | 16 | 06/07/2019 | Ciudad Guayana | VEN | Right | Right | 6' 3" | 175 lbs | - |
| Ortega, José | LF | Houston Astros | 25 | 05/22/2010 | Tampico | MEX | Left | Left | 6' 3" | 200 lbs | $6,700,000 |
| Ortega, José | SP | Free Agent | 23 | 04/29/2012 | Salinas | PUR | Right | Right | 6' 7" | 210 lbs | - |
| Ortega, Juan | C | Houston Astros | 31 | 07/15/2003 | Santo Domingo | DOM | Right | Right | 6' 0" | 190 lbs | $35,000,000 |
| Ortega, Juan | LF | Free Agent | 18 | 01/09/2017 | Puerto Plata | DOM | Right | Left | 6' 2" | 185 lbs | - |
| Ortega, Manny | LF | Cleveland Indians | 25 | 06/30/2009 | Valencia | VEN | Left | Right | 6' 1" | 200 lbs | $500,000 |
| Ortega, Víctor | 3B | Washington Nationals | 16 | 10/08/2018 | Don Juan | DOM | Right | Right | 6' 1" | 185 lbs | - |
| Ortíz, António | SS | San Diego Padres | 18 | 05/05/2017 | Puerto Plata | DOM | Right | Right | 5' 10" | 165 lbs | - |
| Ortíz, Arturo | SS | Pittsburgh Pirates | 17 | 04/11/2018 | Esperanza | DOM | Right | Right | 6' 0" | 155 lbs | - |
| Ortíz, Cisco | SP | Free Agent | 16 | 09/07/2018 | Sterling | USA | Right | Right | 6' 2" | 175 lbs | - |
| Ortíz, Iván | SP | Los Angeles Angels | 19 | 01/03/2016 | Turmero | VEN | Right | Right | 6' 4" | 195 lbs | - |
| Ortíz, Johnny | SP | Pittsburgh Pirates | 31 | 01/18/2004 | Florence | USA | Right | Right | 6' 3" | 215 lbs | $23,500,000 |
| Ortíz, Jorge | SS | Washington Nationals | 27 | 09/15/2007 | Esperanza | DOM | Right | Right | 6' 3" | 205 lbs | $500,000 |
| Ortíz, Jorge | SP | Washington Nationals | 17 | 02/07/2018 | San Juan de la Maguana | DOM | Left | Right | 6' 1" | 175 lbs | - |
| Ortíz, José | SS | New Jersey Pioneers | 16 | 08/24/2018 | Santo Domingo | DOM | Right | Right | 6' 0" | 160 lbs | - |
| Ortíz, José | SP | Boston Red Sox | 19 | 10/29/2015 | Artemisa | CUB | Right | Right | 6' 2" | 180 lbs | - |
| Ortíz, Juan | CF | New York Mets | 27 | 09/07/2007 | Bonao | DOM | Left | Left | 6' 2" | 200 lbs | $6,600,000 |
| Ortíz, Mariano | SS | New York Yankees | 17 | 07/14/2017 | Barinas | VEN | Right | Right | 6' 1" | 165 lbs | - |
| Ortíz, Orlando | SP | Cincinnati Reds | 19 | 10/27/2015 | Maracaibo | VEN | Left | Left | 6' 4" | 190 lbs | - |
| Ortíz, Orlando | 2B | Kansas City Royals | 17 | 02/22/2018 | Tijuana | MEX | Left | Right | 5' 10" | 160 lbs | - |
| Ortíz, Pancho | CF | Seattle Mariners | 16 | 08/20/2018 | Tipitapa | NCA | Right | Right | 6' 1" | 175 lbs | - |
| Ortíz, Tomás | 2B | Oakland Athletics | 17 | 04/09/2018 | San Mateo | VEN | Right | Right | 6' 4" | 190 lbs | - |
| Ortíz, Willy | CF | Cleveland Indians | 16 | 09/05/2018 | Maracaibo | VEN | Left | Right | 6' 2" | 175 lbs | - |
| Ortíz, Xavier | C | Cleveland Indians | 32 | 07/19/2002 | Songo-La Maya | CUB | Right | Right | 6' 4" | 220 lbs | $950,000 |
| Orwick, Doug | CF | Free Agent | 18 | 05/27/2017 | Bell Gardens | USA | Left | Right | 6' 2" | 175 lbs | - |
| Osborne, Jim | SP | St. Louis Cardinals | 30 | 08/20/2004 | Seattle | USA | Switch | Right | 6' 2" | 220 lbs | $1,100,000 |
| Osmonson, Jeff | SP | Free Agent | 17 | 07/23/2017 | Oakland | USA | Right | Right | 6' 3" | 175 lbs | - |
| Ossa, Tomás | SP | Cincinnati Reds | 16 | 07/21/2018 | Constanza | DOM | Left | Left | 6' 6" | 200 lbs | - |
| Osterlund, Joe | SP | Free Agent | 16 | 04/22/2019 | Lake City | USA | Right | Right | 6' 5" | 185 lbs | - |
| Otalora, Raúl | CF | Cincinnati Reds | 18 | 01/19/2017 | Moca | DOM | Right | Right | 6' 0" | 165 lbs | - |
| Otero, Juan | SP | Houston Astros | 17 | 06/07/2018 | San Francisco de Macorís | DOM | Left | Left | 6' 2" | 170 lbs | - |
| Otsuka, Yukiyoshi | LF | San Diego Padres | 17 | 04/23/2018 | Yokohama | JPN | Right | Right | 6' 3" | 190 lbs | - |
| Ourtigueira, Jorge | SP | Washington Nationals | 19 | 01/27/2016 | Maracaibo | VEN | Right | Right | 6' 3" | 180 lbs | - |
| Oven, Alan | SP | Free Agent | 17 | 03/11/2018 | Sunnyside | USA | Right | Left | 6' 8" | 200 lbs | - |
| Overson, Ron | CF | Free Agent | 16 | 07/25/2018 | Chicago | USA | Right | Right | 6' 2" | 170 lbs | - |
| Owens, Don | SP | Houston Astros | 26 | 08/26/2008 | Columbus | USA | Right | Right | 6' 2" | 200 lbs | $500,000 |
| Owens, Gus | 2B | Detroit Tigers | 30 | 04/07/2005 | Evans | USA | Right | Right | 6' 0" | 205 lbs | $10,370,000 |
| Owens, Joe | SP | New York Yankees | 32 | 12/30/2002 | Bowie | USA | Right | Left | 6' 7" | 240 lbs | $950,000 |
| Owes, Norm | 1B | Free Agent | 17 | 07/13/2017 | Uniondale | USA | Left | Left | 6' 1" | 195 lbs | - |
| Oxborrow, Pete | SS | Free Agent | 17 | 06/14/2018 | Lower Merion | USA | Right | Right | 6' 3" | 180 lbs | - |
