Sixteen nations competed at the 2017 World Baseball Classic (WBC).
| Pos. | Position |
|---|---|
| P | Pitcher |
| C | Catcher |
| IF | Infielder |
| OF | Outfielder |
| Player | No. | Pos. | DOB and age | Team | League | Birthplace |
|---|---|---|---|---|---|---|
| Dylan Axelrod | 19 | P | 30 July 1985 (aged 31) | | ||
| Corey Baker | 38 | P | 23 November 1989 (aged 27) | | Major League Baseball | |
| Jeremy Bleich | 27 | P | 18 June 1987 (aged 29) | | Major League Baseball | |
| Richard Bleier ** | 54 | P | 16 April 1987 (aged 29) | | Major League Baseball | |
| Craig Breslow ** | 32 | P | 8 August 1980 (aged 36) | | Major League Baseball | |
| Danny Burawa | 41 | P | 30 December 1988 (aged 28) | | Atlantic League | |
| Gabe Cramer | 11 | P | 1 November 1994 (aged 22) | | Major League Baseball | |
| Scott Feldman ** | 47 | P | 7 February 1983 (aged 34) | | Major League Baseball | |
| Jake Fishman ** | 39 | P | 8 February 1995 (aged 22) | | Major League Baseball | |
| Brad Goldberg ** | 24 | P | 21 February 1991 (aged 26) | | Major League Baseball | |
| Tyler Herron | 33 | P | 5 August 1986 (aged 30) | | American Association | |
| Jake Kalish | 35 | P | 9 July 1991 (aged 25) | | Major League Baseball | |
| Alex Katz | 25 | P | 12 October 1994 (aged 22) | | Major League Baseball | |
| Kenny Koplove ** | 4 | P | 2 August 1992 (aged 24) | | Major League Baseball | |
| Dean Kremer | 17 | P | 7 January 1996 (aged 21) | | Major League Baseball | |
| Jared Lakind ** | 26 | P | 9 March 1992 (aged 24) | | Major League Baseball | |
| Shlomo Lipetz * | 12 | P | 11 February 1979 (aged 38) | | ||
| Jason Marquis | 21 | P | 21 August 1978 (aged 38) | | ||
| Troy Neiman | 44 | P | 13 November 1990 (aged 26) | | Major League Baseball | |
| R. C. Orlan | 16 | P | 28 September 1990 (aged 26) | | Major League Baseball | |
| Ryan Sherriff ** | 72 | P | 25 May 1990 (aged 26) | | Major League Baseball | |
| Zack Thornton * | 46 | P | 19 May 1988 (aged 28) | | ||
| Joey Wagman * | 6 | P | 25 July 1991 (aged 25) | | Major League Baseball | |
| Josh Zeid | 28 | P | 24 March 1987 (aged 29) | | ||
| Ryan Lavarnway | 36 | C | 7 August 1987 (aged 29) | | Major League Baseball | |
| Nick Rickles | 9 | C | 2 February 1990 (aged 27) | | Major League Baseball | |
| Scott Burcham | 5 | IF | 17 June 1993 (aged 23) | | Major League Baseball | |
| Ike Davis | 29 | IF | 22 March 1987 (aged 29) | | Major League Baseball | |
| Cody Decker | 14 | IF | 17 January 1987 (aged 30) | | Major League Baseball | |
| Nate Freiman | 45 | IF | 31 December 1986 (aged 30) | | ||
| Ty Kelly | 56 | IF | 20 July 1988 (aged 28) | | Major League Baseball | |
| Tyler Krieger | 22 | IF | 16 January 1994 (aged 23) | | Major League Baseball | |
| Zach Borenstein | 18 | OF | 23 July 1990 (aged 26) | | Major League Baseball | |
| Sam Fuld | 23 | OF | 19 September 1984 (aged 32) | | ||
| Blake Gailen | 13 | OF | 27 March 1985 (aged 31) | | Atlantic League | |
| Mike Meyers | 7 | OF | 28 December 1993 (aged 23) | | Major League Baseball | |
(61) Tom Brookens, (38) Jeff Jones, (53) Marcel Lachemann, (9) Tino Martinez, (42) Willie Randolph, (1) Alan Trammell [4]
Ryan Kellogg replaced Adam Loewen, (who was originally named to the team), on 1 March 2017. [5]