McCants played for the Philadelphia Eagles, Hamilton Tiger-Cats, Baltimore Ravens and Montreal Alouettes.
As a senior at Arundel High School in Gambrills, Maryland, McCants was an All-State, All-County and All-Metro selection in one season of organized high school football. He led his teams to county and regional championships.
McCants previously played one year of JV football at Oakland Mills High School before transferring to Arundel.
At Delaware State University, McCants played his best season as a senior, at tight end, tallying career-highs of 36 catches, 692 receiving yards and 18 touchdowns. His touchdown total set Delaware State and MEAC records, and was No. 1 in NCAA Division I-AA.
McCants was drafted by the Washington Redskins in the fifth round of the 2001 NFL Draft. After showing promise as an end zone threat in 2003, He fell out of favor with the new coaching staff and spent much of 2004 on the inactive list. He was released after the 2004 season.
Before the 2005 season McCants signed with the Philadelphia Eagles. When active in 2005, he primarily played on special teams. He was released prior to the 2006 season.
On July 11, 2007, McCants was signed by the Hamilton Tiger-Cats.
On January 26, 2008, he was selected 38th overall by Team Tennessee in the 2008 AAFL Draft.
On July 25, 2008, McCants signed with the Baltimore Ravens. He was later released on August 26.
On December 18, 2008, McCants signed with the Montreal Alouettes.
He was released by the Alouettes on March 17, 2009.
Outside of football, Darnerien is an R&B singer, signed by the record label MacVizion LLC. McCants says his music is inspired by artists such as R. Kelly and Michael Jackson.