Calado won his first major title, the ISKA European 77 kg belt, in 2012, with a first-round TKO of Mike Clarke.
Diogo Calado challenged for the WBC Muaythai World Light Heavyweight title, which was at the time vacant. Calado lost to Cheick Sidibé by second-round TKO due to a cut on his eyebrow.[4]
Calado went on a two-fight losing streak during his next fights. He first lost a decision to Yodsanklai Fairtex,[5] followed by a decision loss to Panom Topkingboxing.[6] He snapped the losing streak with a first-round KO of Lofti Talbi, which earned him the ISKA European 75 kg title.[7]
He fought Jiang Chunpeng at Kunlun Fight 22,[8] winning the fight by a third-round KO. After winning a decision against Sameer Siraj, he fought Yohan Lidon,[9] who defeated Calado in a very controversial split decision.[10]
Calado began a five-fight winning streak with a third-round TKO win over Raphaël Llodra to win the Enfusion 75 kg Championship.[11] He next won the WBC Muaythai European title with a decision win over Kamel Mezatni.[12] He then fought during Kunlun Fight 41, where he won a decision against Parviz Abdullayev. At Enfusion 40, he won a decision against Jose Bello.[13]
Calado next took part in the Kunlun Fight 47 Tournament. In the quarter-finals, Diogo won a decision against Alim Nabiev. In the semi-finals, he fought Zhang Yang and lost a decision.[14] Afterwards, he fought the future World Boxing Council Muaythai Muaythai Super Middleweight champion Hamza Ngoto and lost by unanimous decision.[15]
He fought the Albanian kickboxer Shkodran Veseli during the IFN II. Calado won the fight by a unanimous decision.[16][17]
He made his first title defense against Aziz Kallah. He won the fight by a unanimous decision.[18][19]
In 2017 Diogo fought Brad Riddell for the inaugural Strikers League 77 kg title. Calado won the fight by a unanimous decision.[20]
Calado made his second Enfusion title defense during Enfusion 54, when he faced Berat Aliu. Calado won the fight by a fourth round head kick KO.[21]
Diogo Calado lost a unanimous decision to Arthit Hanchana during Kunlun Fight 66, in the quarter-final round of the Kunlun Fight 75 kg tournament.
He participated in the eight man Enfusion Abu Dhabi tournament. He lost in the first, quarter final round, to the future Enfusion 75 kg champion Endy Semeleer.[22][23]
Diogo faced Karim Ghajji during Capital Fight 3.[24] The fight went into a fourth round, where Calado won a decision.[25][26]
Calado fought in the 72.5 kg tournament during Enfusion 72 tournament. He defeated Edye Ruiz in the semi-final by decision, and Nayanesh Ayman by decision in the finals.[27][28][29]
He participated in the Enfusion Al Shiraa 72.5 kg World Grand Prix.[30] In the quarter-finals he faced Zhu Baotong and won a unanimous decision. He then fought Superbon Banchamek in the tournament semi finals and lost a unanimous decision.[31][32][33]
Diogo Calado fought Maximo Suarez during Enfusion 81 in Tenerife. He won the fight by a first-round knockout.[34]
Calado fought Davide Armanini during the May 2019 Oktagon event. Calado lost the fight by KO.[35][36]
In December 2021 he participated in IFMA World championships. He fought on the -81 kg weight category where he defeated Cristiano Zachenttin from Brasil on the 16th finals, Ondrej Malina from Czech Republic on the 8th finals, he passed through the quarter-finals due to a no show from the fighter from Denmark and then lost on points on the semi-finals versus Vasyl Sorokin from Ukraine winning a bronze medal.[37]
Due to his bronze medal on the last IFMA World championships, Diogo was invited to fight on The World Games 2022 edition, on the 81 kg Muay Thai category. He won a silver medal, losing in the final versus Aaron Ortiz from the US on a very controversial decision.
In 2024 Diogo did his MMA debut winning by submission on the first round.