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| Player | Team | Agency | Notes |
|---|---|---|---|
| Trae Arbet | Pirates | SSG Baseball | |
| Garrett Atkins | Pirates | Jeff Blank | |
| Joey Bart | Pirates | Excel Sports Management | |
| A.J. Burnett | Pirates | Frontline | |
| Beau Burrows | Pirates | Frontline | |
| Vicente Campos | Pirates | TLA Worldwide | |
| Lonnie Chisenhall | Pirates | Turner Gary Sports | |
| Mike Clevinger | Pirates | ACES | |
| Phil Coke | Pirates | Full Circle Sports Management | |
| Rookie Davis | Pirates | Full Circle Sports Management | |
| Chris Devenski | Pirates | ALIGND Sports Agency | |
| Cody Dickson | Pirates | Platinum Sports | |
| Zack Dodson | Pirates | CAA Sports | Peter Vescovo |
| Nick Franklin | Pirates | Boras Corporation | |
| Todd Frazier | Pirates | CAA Sports | |
| Domingo German | Pirates | Ballplayers Agency | |
| Konnor Griffin | Pirates | Excel Sports Management | |
| Trey Haley | Pirates | ISE Baseball | |
| Corey Hart | Pirates | CAA Sports | Jeff Berry |
| John Hellweg | Pirates | CAA Sports | Jeff Berry |
| Anderson Hernandez | Pirates | GSE Worldwide | |
| Joe Hudson | Pirates | Meister Sports Management | |
| Brandon Inge | Pirates | ACES | |
| Steven Jackson | Pirates | ISE Baseball | |
| John Jaso | Pirates | ACES | |
| Jung-ho Kang | Pirates | Wasserman | |
| Jeff Karstens | Pirates | All Bases Covered | |
| Mitch Keller | Pirates | Excel Sports Management | |
| Tom Koehler | Pirates | Pro Agents, Inc. | Dave Pepe |
| Joe La Sorsa | Pirates | Gaeta Sports Management | |
| Justin Lawrence | Pirates | Ballengee Group | |
| Derrek Lee | Pirates | Excel Sports Management | Casey Close |
| Charlie Leesman | Pirates | Pro Star Management, Inc. | |
| Domingo Leyba | Pirates | ISE Baseball | |
| Brad Lincoln | Pirates | CAA Sports | Peter Vescovo |
| Jesus Liranzo | Pirates | Movement Management Group | |
| Brandon Lowe | Pirates | The Bledsoe Agency | |
| Doug Mathis | Pirates | Sports Pro Services | Danny Burgers |
| Brandon Maurer | Pirates | Frye McCann Sports | |
| Jose Morales | Pirates | MDR Sports Management | |
| Brent Morel | Pirates | Apex Baseball | |
| John Ryan Murphy | Pirates | ISE Baseball | |
| Daniel Nava | Pirates | ISE Baseball | |
| Ryan O'Hearn | Pirates | Platinum Sports | |
| Jose Osuna | Pirates | ISE Baseball | |
| Jose Osuna | Pirates | ISE Baseball | |
| Marcell Ozuna | Pirates | MDR Sports Management | |
| Curtis Partch | Pirates | Sterling Sports Management | |
| Wily Peralta | Pirates | GSE Worldwide | |
| Zach Phillips | Pirates | Matt Colleran | |
| Felix Pie | Pirates | ISE Baseball | |
| Aramis Ramirez | Pirates | Rep 1 Baseball | |
| Bryan Reynolds | Pirates | CAA Sports | |
| Jason Rogers | Pirates | Rep 1 Baseball | |
| Dennis Santana | Pirates | Optimum Baseball Associates | |
| Bo Schultz | Pirates | McNamara Baseball Group | |
| Kevin Siegrist | Pirates | GSE Worldwide | |
| Brett Sinkbeil | Pirates | Frontline | |
| Doug Slaten | Pirates | Paragon Sports International | |
| Caleb Smith | Pirates | Ballengee Group | |
| Josh Smoker | Pirates | Ballengee Group | |
| Gregory Soto | Pirates | Munger English Sports Management | |
| Deon Stafford | Pirates | Reynolds Sports Management | |
| D.J. Stewart | Pirates | Boras Corporation | |
| Josh Stinson | Pirates | Moye Sports Associates | |
| Andrew Susac | Pirates | GSE Worldwide | |
| Darnell Sweeney | Pirates | Reynolds Sports Management | |
| Oscar Tejeda | Pirates | GSE Worldwide | |
| Joey Terdoslavich | Pirates | TWC Sports | |
| Jose Urquidy | Pirates | Full Circle Sports Management | |
| Felipe Vazquez | Pirates | Magnus Sports | Last name legally changed from Rivero (4-9-18). |
| Wei-Chung Wang | Pirates | Boras Corporation | |
| Duke Welker | Pirates | BBI Sports Group | |
| Eric Wood | Pirates | Ballplayers Agency | |
| Steven Wright | Pirates | Ballengee Group |