Costello van Steenis has three losses against three opponents on his MMA record. For a list of Steenis's best fights, refer to "Best fights of Costello van Steenis".
On May 12, 2023 Costello van Steenis faced off against Douglas Lima in a middleweight bout at age 30. He was coming in with a record of 14-3 (10), and Lima was 35 years old and with a record of 32-11 (25). Steenis lost the fight via 3-round unanimous decision.
On November 8, 2019 Costello van Steenis faced off against John Salter in a middleweight bout at age 27. He was coming in with a record of 12-2 (9), and Salter was 34 years old and with a record of 16-4 (15). Steenis lost the fight via 3-round unanimous decision.
On December 12, 2015 Costello van Steenis faced off against Jake Bostwick in a middleweight bout at age 23. He was coming in with a record of 6-1 (5). Steenis lost the fight via 3-round unanimous decision.
