Costello van Steenis (17-3, 12) was born in Rotterdam, Netherlands on July 26, 1992. At the age of 21 years on April 5, 2014, he made his professional MMA debut against Andy Peters, winning the fight via 2-round unanimous decision.
Steenis' last fight was a middleweight title fight against Johnny Eblen for Eblen's PFL World Championship title on July 19, 2025. He stopped Eblen via choke-out and was crowned the new middleweight PFL champion. He is on a 3-fight winning streak.
Some of Costello van Steenis' best fights have been against Johnny Eblen, Chris Honeycutt, Fabian Edwards, Steve Skrzat, Kevin Fryer, Mike Shipman and Kamil Oniszczuk.
Steenis has 3 losses on his MMA record.
| # | Date | Opponent | Promotion | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|---|
20  | Jul 19, 2025 32 years, 11 months 17-3 (12) | 33 years, 7 months 16-0 (7) | PFL | MD | 5 | CKO | WIN Rear-naked choke Won PFL World middleweight title |
19 | Nov 29, 2024 32 years, 4 months 16-3 (12) | João Vitor Dantas | PFL | MD | 1 | KO | WIN Head kick |
18 | May 17, 2024 31 years, 9 months 15-3 (11) | Gregory Babene | Bellator | MD | 2 | SUB | WIN Von flue choke |
17  | May 12, 2023 30 years, 9 months 14-3 (10) | 35 years, 4 months 32-11 (25) | Bellator | MD | 3 | UD | LOSS |
16 | Oct 29, 2022 30 years, 3 months 14-2 (10) | Kamil Oniszczuk | Bellator | MD | 2 | SUB | WIN Brabo choke |
15  | Sep 26, 2020 28 years, 2 months 13-2 (9) | 27 years, 6 months 9-0 (6) | Bellator | MD | 3 | SD | WIN |
14  | Nov 8, 2019 27 years, 3 months 12-2 (9) | 34 years, 7 months 16-4 (15) | Bellator | MD | 3 | UD | LOSS |
13 | Jun 22, 2019 26 years, 10 months 12-1 (9) | Mike Shipman | Bellator | MD | 2 | KO | WIN Punches |
12  | Nov 30, 2018 26 years, 4 months 11-1 (8) | 30 years, 4 months 11-2 (6) | Bellator | MD | 3 | SD | WIN |
11 | May 25, 2018 25 years, 9 months 10-1 (8) | Kevin Fryer | Bellator | MD | 1 | TKO | WIN Punches |
10 | Oct 20, 2017 25 years, 2 months 9-1 (7) | Steve Skrzat | Bellator | MD | 1 | TKO | WIN Submission to elbows |
9 | Mar 4, 2017 24 years, 7 months 8-1 (6) | Marcin Naruszczka | MD | 2 | DQ | WIN Illegal kick to downed opponent | |
8 | Aug 27, 2016 24 years, 1 months 7-1 (6) | Ronan McKay | MD | 1 | SUB | WIN Rear-naked choke | |
7 | Dec 12, 2015 23 years, 4 months 6-1 (5) | Jake Bostwick | MD | 3 | UD | LOSS | |
6 | Sep 12, 2015 23 years, 1 months 6-0 (5) | Avi Jack | MD | 1 | SUB | WIN Triangle choke | |
5 | Jun 13, 2015 22 years, 10 months 5-0 (4) | Harry McLeman | MD | 2 | SUB | WIN Triangle choke | |
4 | Mar 28, 2015 22 years, 8 months 4-0 (3) | Andy Manzolo | MD | 1 | TKO | WIN Punches | |
3 | Mar 14, 2015 22 years, 7 months 3-0 (2) | Maarten Wouters | MD | 1 | SUB | WIN Rear-naked choke | |
2 | Oct 4, 2014 22 years, 2 months 2-0 (1) | Cenk Toplar | MD | 1 | SUB | WIN Rear-naked choke | |
1 | Apr 5, 2014 21 years, 8 months 1-0 (0) | Andy Peters | MD | 2 | UD | WIN |
