Career
He was signed by the New York Giants as an undrafted free agent in 2006. He played college football at UCF. Johnson also played for the Saint Louis Rams. He played in 48 games with 35 starts at the University of Central Florida.
He caught 81 passes for 919 yards (113-yard avg) and scored 6 touchdowns while recording 14 tackles (8 solo) on special teams, also had a 22-yard kickoff return.
Johnson earned All-Conference United States of America 2nd-team honors in 2005 as a senior, he was ranked 3rd on the squad with 36 catches for 435 yards (121-yard avg) and 2 touchdowns. He graduated in May 2005 with a degree in criminal justice
New York Giants
He signed with the active roster on December 26, 2006.
Johnson was placed on the injured reserve, ending his 2007 season. Darcy suffered a partial tear of his Anterior Cruciate Ligament and underwent surgery to repair lieutenant
Johnson"s first career reception was a 1-yard touchdown catch thrown by Eli Manning against the Baltimore Ravens November 16, 2008.
Johnson was placed on injured reserve by the Giants on December 23, 2009. Saint Louis Rams
Johnson signed with the Saint Louis Rams on March 22, 2010. He was placed on the injured reserve list on October 12.
Virginia Destroyers
Johnson was signed by the Virginia Destroyers of the United Football League on September 1, 2011.