[1] He played for the Houston Oilers, Kansas City Chiefs, Minnesota Vikings, and Washington Redskins during his thirteen-year career from 1988 to 2000 in the National Football League (NFL).

Dishman played college football at Purdue University, where he was named to the All-Big Ten team in 1987.

[9] In 1990, with the addition of new head coach Jack Pardee, Dishman was moved to the starting left cornerback position, and finished the season with 4 interceptions.

[9] The next time the Oilers faced the Bengals during week nine, Dishman picked off a Boomer Esiason pass to mark the seventh straight game in which he forced a turnover.

In the second game of the season against the Chiefs, Dishman had a 58-yard touchdown run after taking the ball from tight end Mike Dyal.

[4] However, after a disappointing 1998 season and subsequent release, he signed with the Kansas City Chiefs after an impressive workout, filling the void left by Dale Carter.

[23] His release came three weeks after he was embarrassed on Monday Night Football by an improbable Antonio Freeman touchdown catch during overtime.

[24] Dishman raised his arms in victory believing he had broken up the pass, thus allowing Freeman to run untouched into the end zone.

[26] On May 20, 2018, Dishman joined the Montreal Alouettes as part of the Canadian Football League CFL to coach the defensive backs.

[28] On July 1, 2020, Dishman was named the defensive backs coach for IMG Academy in Bradenton, FL.

[30] Dishman was officially hired by the Vegas Vipers on September 13, 2022[31] # denotes interim head coach