Early years (2000–2005)

After graduating from Fresno State, Abney joined the Pennsylvania ValleyDawgs for the 2000 United States Basketball League season. In July 2000, he joined the Denver Nuggets for the Rocky Mountain Revue. Later that year, he signed with the Trenton Shooting Stars for the 2000–01 IBL season.

In 2001, he re-joined the Pennsylvania ValleyDawgs. Later that year, he signed with the Mobis Automons for the 2001–02 Korean Basketball League season. Following the KBL season, he joined the Adirondack Wildcats for the 2002 USBL season. In July 2002, he joined the Boston Celtics for the 2002 NBA Summer League.

On October 31, 2002, he was selected in the 10th round of the 2002 NBA D-League draft by the Asheville Altitude. In 2003, he signed with Beauvais BC of France for the 2003–04 LNB Pro B season, and in 2004, he signed with ETHA Engomis of Cyprus for the 2004–05 Cyprus Basketball Division 1 season.

In the 2005 off-season, he played for Cocodrilos de Caracas, the New Jersey Flyers and Reales de La Vega.

Australia (2005–2008)

In August 2005, Abney signed with the Townsville Crocodiles for the 2005–06 NBL season. He went on to be named to the All-NBL first team and garnered NBL All-Star honors. On February 10, 2006, he re-signed with the Crocodiles on a two-year deal.^[5] Later that month, he joined Étendard de Brest of France for the rest of the 2005–06 LNB Pro A season.

In 2006–07, he was again an NBL All-Star honoree and was named to the All-NBL second team. In March 2007, he joined Al Jaish Damascus of Syria. On April 19, 2007, he signed a new two-year deal with the Cairns Taipans, reportedly leaving the Crocodiles for more money.^[6] In 2007–08, he was again an NBL All-Star honoree.

On December 11, 2008, Abney was released by the Taipans because the club could not longer afford him, fellow import Dave Thomas or head coach Alan Black. The Taipans did continue playing, however, only after the entire team agreed to a blanket 45 per cent pay cut for the rest of the season.^[7][8][9]

Europe and Argentina (2009–2010)

On January 19, 2009, Abney signed with EiffelTowers Den Bosch for the rest of the 2008–09 season.^[10]

In the summer of 2009, he signed with Ciclista Olímpico of Argentina for the 2009–10 season. In November 2009, he left Ciclista Olímpico and signed with Estudiantes de Bahía Blanca.^[11] In December 2009, he left Estudiantes after seven games. In February 2010, he signed with Halcones Rojos Veracruz of Mexico but left after just eight games. On March 18, 2010, he signed with BC Khimik of the Ukrainian Basketball SuperLeague.^[12] However, on April 8, 2010, he was waived by Khimik after just four games.^[13]

In the summer of 2010, he signed with Gimnasia y Esgrima of Argentina for the 2010–11 season. In November 2010, he left Gimnasia. The next month, he received a try-out from BC Odesa of the Ukraine.^[14]

Return to NBL (2012)

On January 11, 2012, Abney signed with the Southland Sharks for the 2012 New Zealand NBL season.^[15]

On October 2, 2012, Abney returned to the Townsville Crocodiles, signing with the club for the 2012–13 NBL season.^[16] However, on November 28, 2012, he announced his retirement on advice from his surgeon, who discovered a small hole in his thigh bone.^[17][18] He managed just nine games for the Crocodiles in 2012–13, averaging 4.4 points and 3.4 rebounds per game.^[19]