Orcollo began competing outside the Philippines in 2002. That year, he competed in the
WPA World Nine-ball Championship where he finished 17th place. In 2006, Orcollo began his campaign in the
U.S. There he won a number of tournaments, including the
Reno Open, the
Hard Times Nine-ball Tournament and two events. Because his compatriots had entered a less prestigious event in Asia, Orcollo was the only player from the Philippines to compete in the inaugural
World Straight Pool Championship. Also in 2006, Orcollo won the last edition of the
World Pool League tournament against
Niels Feijen. In 2007, Orcollo reached the finals of the WPA World Eight-ball Championship only to be bested by countryman
Ronato Alcano. He would again reach the finals of the same event in 2011, this time to win against Niels Feijen. In 2008, Orcollo won the
Japan Nine-ball Open beating Ryogi Aoji of Japan 9–2 in the finals. Four months later, Orcollo ruled the inaugural
Qatar World Nine-ball Open tournament defeating Niels "The Terminator" Feijen of Netherlands 13–5 in the championship match to bag the title and the top purse of $40,000. Feijen, received the runner-up prize of $20,000. In 2010, Orcollo tops the
World Pool Masters, which featured over 750 players from around the world and was hosted at the
Riviera Hotel & Casino in Las Vegas. He defeated Japanese player Toru Kuribayashi 8–3 in the final and took home the $20,000 top prize. Orcollo also won the
Asian Games Nine-ball singles, beating compatriot
Warren Kiamco, 9–7. He was awarded as one of the 2010
Philippines Sportsman of the year. In 2011, Orcollo snapped off his first World title after beating Neils Feijen of Netherlands 10–3 in the final of the
World Eight-ball Championship. Orcollo won the 2011
Derby City Classic nine-ball, beating American player
Shane Van Boening 7–2 in the final. Orcollo also won the Predator International Ten-ball Championship for the second time after he beat
Mika Immonen of Finland 10–8. Orcollo was named the 2011
WPA player of year. In 2012, Orcollo won the
US Open Ten-ball Championship, defeating compatriot
Francisco "Django" Bustamante, 11–5 in the championship match to win the top prize of US$15,000. He then won the Hard Times Ten-ball Open after he dominated Shane Van Boening 11–3 in the final. Orcollo also conquered the
China Open Nine-ball Championship when he dispatched Chinese Taipei's Lu Hui-Chan, 11–9. Orcollo was named the 2012 AZBilliards player of the year. In 2013, Dennis Orcollo and
Lee Vann Corteza clinched the
World Cup of Pool after defeating the Dutch tandem of Niels Feijen and
Nick van den Berg, 10–8, at York Hall in London, England. They became the third Filipino duo to win the annual single-elimination tournament for doubles teams in nine-ball competition after
Efren "Bata" Reyes and Francisco "Django" Bustamante won the inaugural event in 2006 and then repeated in 2009. Orcollo sought redemption after he came up close in
2010 World cup of Pool with a second-place finish with his partner
Roberto Gomez, bowing to eventual winners
Li Hewen and
Fu Jianbo of China. In 2015, Orcollo overcame
Mike Dechaine 11–9 in the final to win the
US Open eight-ball Championship. Orcollo earned $11,000 for first place, while Dechaine settled for $7,000. In 2016, Orcollo defeated Shane Van Boening, 200–121 to win the
U.S. Open Straight Pool Championship, In 2021, Orcollo defeated Shane Van Boening again, this time by a score of 120–115 in their race to a 120 nine-ball rematch. In their early match on day 1, Orcollo runs an incredible 11 straight racks in a row. The only other pool player to ever have run 11 consecutive racks in history was
Earl Strickland. In 2022, Orcollo was the fourth Filipino pool player to be inducted into the BCA Hall of fame, joining fellow countrymen Efren Reyes, Francisco Bustamante, and
Jose Parica. ==Deportation==