| Player | Position | Team | Years | Amount | Option |
|---|---|---|---|---|---|
| Fernando Abad | RP | Giants | 1 | Minor | |
| Ruben Alaniz | RP | Mariners | 1 | $555K | |
| Cody Allen | RP (Closer) / RP | Angels | 1 | $8.5MM | |
| Luis Avilan | RP | Mets | 1 | Minor | |
| John Axford | RP | Blue Jays | 1 | Minor | |
| Tony Barnette | RP | Cubs | 1 | $750K | Club |
| Matt Belisle | RP | ||||
| Joaquin Benoit | RP | ||||
| Christian Bergman | RP | Cubs | 1 | Minor | |
| Jerry Blevins | RP | Athletics | 1 | Minor | |
| Brad Boxberger | RP | Royals | 1 | $2.2MM | |
| Blaine Boyer | RP | ||||
| Brad Brach | RP (Closer) / RP | Cubs | 1 | $3MM | Mutual |
| Zach Britton | RP (Closer) / RP | Yankees | 3 | $39MM | Club |
| Rex Brothers | RP | Yankees | 1 | Minor | |
| Matt Bush | RP | Rangers | 1 | Minor | |
| Santiago Casilla | RP | ||||
| Xavier Cedeno | RP | Cubs | 1 | $900K | |
| Jesse Chavez | RP | Rangers | 2 | $8MM | |
| Tyler Clippard | RP | Indians | 1 | Minor | |
| Louis Coleman | RP | Tigers | 1 | Minor | |
| Tim Collins | RP | Twins | 1 | Minor | |
| Daniel Coulombe | RP | Yankees | 1 | Minor | |
| Matt Davidson | 1B / RP / 3B | Rangers | 1 | Minor | |
| Jorge De La Rosa | RP | ||||
| Randall Delgado | RP | White Sox | 1 | Minor | |
| Jake Diekman | RP | Royals | 1 | $2.75MM | Mutual |
| Zach Duke | RP | Reds | 1 | $2MM | |
| Jeurys Familia | RP (Closer) / RP | Mets | 3 | $30MM | |
| Jaime Garcia | RP / SP | Retirement | |||
| Cory Gearrin | RP | Mariners | 1 | $1.5MM | |
| Jeanmar Gomez | RP | Rangers | 1 | Minor | |
| Javy Guerra | RP | Blue Jays | 1 | Minor | |
| Chris Hatcher | RP | ||||
| Kelvin Herrera | RP (Closer) / RP | White Sox | 2 | $18MM | Vesting |
| Greg Holland | RP (Closer) / RP | Diamondbacks | 1 | $3.25MM | |
| Daniel Hudson | RP | Angels | 1 | Minor | |
| Drew Hutchison | RP / SP | Yankees | 1 | Minor | |
| Gregory Infante | RP | Orioles | 1 | Minor | |
| Dan Jennings | RP | Angels | 1 | Minor | |
| Jim Johnson | RP | ||||
| Shawn Kelley | RP | Rangers | 1 | $2.75MM | Club |
| Casey Kelly | RP | Korea | |||
| Joe Kelly | RP (Closer) / RP | Dodgers | 3 | $25MM | Club |
| Craig Kimbrel | RP (Closer) / RP | Cubs | 3 | $43MM | Vesting |
| George Kontos | RP | Cubs | 1 | Minor | |
| Francisco Liriano | RP / SP | Pirates | 1 | Minor | |
| Aaron Loup | RP | Padres | 1 | $1.2MM | Club |
| Jordan Lyles | RP / SP | Pirates | 1 | $2.05MM | |
| Tyler Lyons | RP | Pirates | 1 | Minor | |
| Ryan Madson | RP | ||||
| Brandon Maurer | RP | Pirates | 1 | Minor | |
| Zach McAllister | RP | Rangers | 1 | $1MM | |
| Andrew Miller | RP (Closer) / RP | Cardinals | 2 | $25MM | Vesting |
| Matt Moore | RP / SP | Tigers | 1 | $2.5MM | |
| Peter Moylan | RP | Retirement | |||
| Bud Norris | RP (Closer) / RP | Blue Jays | 1 | Minor | |
| Adam Ottavino | RP (Closer) / RP | Yankees | 3 | $27MM | |
| Blake Parker | RP (Closer) / RP | Twins | 1 | $1.8MM | |
| Oliver Perez | RP | Indians | 1 | $2.5MM | Vesting |
| Jake Petricka | RP | Brewers | 1 | $900K | |
| David Phelps | RP | Blue Jays | 1 | $2.5MM | Club |
| A.J. Ramos | RP (Closer) / RP | ||||
| David Robertson | RP (Closer) / RP | Phillies | 2 | $23MM | Club |
| Sergio Romo | RP (Closer) / RP | Marlins | 1 | $2.5MM | |
| Trevor Rosenthal | RP (Closer) / RP | Nationals | 1 | $7MM | Vesting |
| Robbie Ross | RP | Reds | 1 | Minor | |
| Zac Rosscup | RP | Mariners | 1 | Unknown | |
| Kyle Ryan | RP / SP | Cubs | 1 | $555K | |
| Marc Rzepczynski | RP | Diamondbacks | 1 | Minor | |
| Fernando Salas | RP | ||||
| Hector Santiago | RP / SP | Mets | 1 | Minor | |
| Tony Sipp | RP | Nationals | 1 | $1.25MM | Mutual |
| Carson Smith | RP | Red Sox | 1 | Minor | |
| Joakim Soria | RP (Closer) / RP | Athletics | 2 | $15MM | |
| Drew Storen | RP | Royals | 1 | Minor | |
| Hunter Strickland | RP | Mariners | 1 | $1.3MM | |
| Junichi Tazawa | RP | Cubs | 1 | Minor | |
| Pat Venditte | RP / RP | Giants | 1 | $585K | |
| Nick Vincent | RP | Giants | 1 | Minor | |
| Adam Warren | RP | Padres | 1 | $2.5MM | Club |
| Justin Wilson | RP | Mets | 2 | $10MM | |
| Alex Wilson | RP | Indians | 1 | Minor | |
| Blake Wood | RP |
This free agent tracker covers the time period beginning the day after the World Series ends in 2018, up until the day before Opening Day 2019.
