During the 2005 season, Cooley had a solid season as a receiver, catching 71 passes for 774 yards and seven touchdowns, including three in a game versus the rival Dallas Cowboys, breaking the Redskins franchise record for receptions as a tight end in a single season. Those three touchdowns cost Cooley his fantasy football playoff game, because his opponent had Cooley on his fantasy team. He led all NFC tight ends in fan voting for the annual Pro Bowl with 422,314 votes, but following player and coach voting (each group had 1/3 weight), was not chosen for the position. He was named first team All-NFC by Pro Football Weekly.
Though he has previously attended The Church of Jesus Christ of Latter-day Saints, he has not affiliated with that Church since at least 2004. He and his first wife Angela divorced in 2005. Later that year, he started dating Redskinnette (Redskin cheerleader) Christy Oglevee. She was fired for fraternizing with Redskins players, which the Redskins organization prohibits. They married on May 23, 2008 in Landsdowne, Virginia. In January 2012 they separated and in September they announced their intent to divorce. Cooley's first child, daughter Sloane, was born on September 11, 2014.