These lists include all players who have made at least one appearance in a competitive match for the Bethlehem Steel FC since the team's first USL season in 2016. Players who have been listed on the team's roster but have not made any appearances are not listed.
Regular Season players
United League Soccer clubs are allowed a roster of 30 players at any one time during the USL season.
Outfield Players
- As of January 13, 2018
| Name |
Position |
Country |
Acquired From |
Years |
Games |
Minutes |
Goals |
Assists |
| Aaron Jones | DF |  ENG |  Philadelphia Union | 2017 | 29 | 2,577 | 2 | 1 |
| Adam Najem | MF | USA | Philadelphia Union | 2017– | 23 | 1,989 | 2 | 8 |
| Amoy Brown | FW |  JAM | St George's College | 2016– | 11 | 183 | 0 | 0 |
| Anderson Conceição | DF |  BRA | Philadelphia Union | 2016 | 13 | 1,132 | 0 | 0 |
| Anthony Fontana | MF | USA | Philadelphia Union Academy | 2016– | 19 | 964 | 0 | 0 |
| Auston Trusty | DF | USA | Philadelphia Union Academy | 2016– | 44 | 3,960 | 0 | 2 |
| Bolu Akinyode | MF |  NGA | New York Red Bulls II | 2016 | 26 | 2,176 | 0 | 0 |
| Brenden Aaronson | MF | USA | Philadelphia Union Academy | 2017– | 6 | 214 | 0 | 0 |
| Brian Carroll | MF | USA | Philadelphia Union | 2017 | 2 | 152 | 0 | 0 |
| Charlie Davies | FW | USA | Philadelphia Union | 2017 | 1 | 90 | 1 | 0 |
| Charlie Reymann | DF | USA | University of Kentucky | 2017 | 9 | 636 | 0 | 0 |
| Chris Nanco | MF |  CAN | Syracuse University | 2017 | 28 | 1,688 | 4 | 2 |
| Chris Wingate | MF |  NOR | University of New Hampshire | 2017 | 6 | 361 | 0 | 0 |
| Cole Missimo | MF | USA | Philadelphia Union | 2016 | 19 | 842 | 0 | 1 |
| Cory Burke | FW | JAM | Rivoli United F.C. | 2016–2017 | 45 | 3,266 | 13 | 4 |
| Dawson McCartney | MF | USA | Philadelphia Union Academy | 2017– | 3 | 155 | 0 | 0 |
| Derrick Jones | MF |  GHA | Philadelphia Union Academy | 2016– | 38 | 3,246 | 6 | 3 |
| Eric Ayuk | MF |  CMR | Philadelphia Union | 2016 | 17 | 1,442 | 3 | 1 |
| Fabian Herbers | FW |  GER | Philadelphia Union | 2016– | 9 | 605 | 3 | 0 |
| Fred | MF | BRA | Philadelphia Union | 2016 | 6 | 169 | 0 | 0 |
| Gabe Gissie | FW |  LBR | Sacramento Republic FC | 2016 | 18 | 690 | 1 | 0 |
| Giliano Wijnaldum | DF |  NED | Philadelphia Union | 2017 | 7 | 615 | 0 | 0 |
| Hugh Roberts | DF | USA | Richmond Kickers | 2017 | 26 | 2,091 | 1 | 0 |
| Issa Rayyan | FW | USA | Philadelphia Union Academy | 2017– | 1 | 9 | 0 | 0 |
| Jack Elliot | DF | ENG | Philadelphia Union | 2017 | 1 | 75 | 0 | 0 |
| James Chambers | MF |  IRE | St Patrick's Athletic F.C. | 2016– | 55 | 4,475 | 8 | 5 |
| Jamie Luchini | FW | USA | Lehigh Mountain Hawks | 2016 | 16 | 581 | 0 | 0 |
| Josue Monge | MF | USA | Philadelphia Union Academy | 2016– | 5 | 110 | 0 | 0 |
| Josh Heard | MF | CAN | Washington Huskies | 2016–2017 | 38 | 1,197 | 2 | 0 |
| Joshua Yaro | DF | GHA | Philadelphia Union | 2016– | 9 | 803 | 0 | 0 |
| Justin McMaster | MF | USA | Philadelphia Union Academy | 2016– | 9 | 262 | 0 | 0 |
| Keegan Rosenberry | DF | USA | Philadelphia Union | 2017 | 1 | 90 | 0 | 0 |
| Ken Tribbett | DF | USA | Philadelphia Union | 2016–2017 | 13 | 1,128 | 1 | 1 |
| Leo Fernandes | MF | BRA | Philadelphia Union | 2016 | 14 | 1,193 | 1 | 0 |
| Mark McKenzie | DF | USA | Philadelphia Union Academy | 2016– | 8 | 651 | 0 | 0 |
| Marcus Epps | MF | USA | Philadelphia Union | 2017– | 13 | 1,012 | 1 | 0 |
| Matt Mahoney | DF | USA | Temple University | 2017– | 9 | 405 | 0 | 0 |
| Matthew Real | DF | USA | Philadelphia Union Academy | 2016– | 20 | 1,691 | 1 | 1 |
| Maurice Edu | MF | USA | Philadelphia Union | 2016–2017 | 6 | 336 | 0 | 0 |
| Michael Daly | DF | USA | Sacramento Republic FC | 2016 | 17 | 1,321 | 1 | 0 |
| Michael Pellegrino | MF | USA | Philadelphia Union Academy | 2017– | 2 | 180 | 0 | 0 |
| Nick Bibbs | DF | USA | Saint Louis FC | 2016 | 12 | 698 | 1 | 0 |
| Raheem Taylor-Parkes | FW | CAN | Philadelphia Union Academy | 2016– | 3 | 59 | 0 | 0 |
| Richie Marquez | DF | USA | Philadelphia Union | 2017 | 4 | 360 | 1 | 0 |
| Ryan Richter | DF | USA | Ottawa Fury FC | 2016 | 29 | 2,610 | 5 | 4 |
| Santi Moar | FW |  ESP | Pfeiffer University | 2017– | 30 | 1,803 | 6 | 6 |
| Seku Conneh | FW | LBR | FC Oss | 2016–2017 | 44 | 2,611 | 12 | 2 |
| Seth Kuhn | MF | USA | Philadelphia Union Academy | 2017– | 1 | 6 | 0 | 0 |
| Taylor Washington | DF | USA | Philadelphia Union | 2016 | 28 | 2,473 | 0 | 0 |
| Tiger Graham | FW | USA | Philadelphia Union Academy | 2017– | 1 | 17 | 0 | 0 |
| Walter Restrepo | MF |  COL | Philadelphia Union | 2016 | 8 | 602 | 0 | 1 |
| Yosef Samuel | MF | USA | Philadelphia Union Academy | 2016–2017 | 21 | 562 | 0 | 1 |
Goalkeepers
- As of January 13, 2017
