Clark played college football at James Madison University in Harrisonburg, Virginia, where he caught 155 passes for 2,863 yards and 16 touchdowns.

Clark was selected by the Washington Redskins in the second round of the 1984 NFL supplemental draft of USFL and CFL players.

He followed up his superb rookie season in 1986 with a Pro Bowl year catching 74 passes for 1,265 yards and seven touchdowns.

Clark set a Redskin record for receiving yards in a game during a Monday Night Football contest with the New York Giants.

The record still stands today as the "most receiving yards in a non-strike game" (Anthony Allen surpassed Clark's tally during the 1987 strike season).

Clark's toughness, big-play ability and willingness to block made him a regular on the All Madden Team during his playing career.

Clark, along with fellow receivers Art Monk and Ricky Sanders, surpassed the 1,000 yard mark in 1989.

The Redskins finished 14–2, won the NFC East, and claimed home field advantage throughout the playoffs.

Washington beat Atlanta, 24–7, and crushed Detroit, 41–10, to earn a berth in Super Bowl XXVI against the Buffalo Bills.

Clark, Monk, and Sanders gave the Redskins one of the best receiving corps in the NFL during the late 1980s and early 1990s.

Clark was long known as the most fiery spirit of the bunch, and he was known to run laps around RFK Stadium after touchdowns and during Redskins comebacks.

[3] Clark was the owner of the now closed South Beach Restaurant and Martini Lounge in Bethesda, Maryland.

He was inducted into the Redskins Ring of Honor on October 7, 2007, and concluded his speech with, "We are going to spank Detroit's butt."