This Grand Rapids, MI native was a defensive end at the University of Michigan from 1968 to 1972, and later selected as a member of the All-Time Team of the Modern Era (1947-1997). During his college career, Keller was an All-American and All Big-Ten player who started in two Rose Bowls, as well as the 1972 College All-Star.

After being selected as a third-round draft choice, Keller became a linebacker for the Dallas Cowboys, appearing on two playoff teams. In 1973, he became one of the first players in the history of the National Football League (NFL) to work as a scout while playing - becoming a year-round employee of the Cowboys when they were the most dominant team in football.

In 1975, he became the assistant personnel director for the Seattle Seahawks, playing an integral role in the start up of the NFL's 27th franchise. In 1978, he was appointed assistant General Manager. The next year, the Seahawks were chosen as the NFL Franchise of the Year.

His experience in start-up leagues began with the United States Football League (USFL) in 1982. Keller was the director of football operations for the Michigan Panthers and responsible for scouting, drafting, and signing all players - including members of the 1983 USFL Championship squad.

In 1989, he became the first general manager of the World League of American Football's Sacramento Surge. Under Keller's watch, the Surge won the World League Championship next year, and was voted the World League's Organization of the Year in 1992. In 1995, Keller was hired as a World League management consultant and was assigned to the struggling (1-3) Frankfurt Galaxy, helping them go unbeaten the rest of the season and making their way into the World League Championship. In 1996, Keller was named general manager of the Scottish Claymores, and once again won the World League Championship.

Since 1998, Keller has hosted "Inside the Business of Sports," a nightly radio program analyzing the sports industry on WMFN in Grand Rapids. He was also a television analyst for the Arena Football League's Grand Rapids Rampage for FOX Sports Detroit and WWMT in Michigan in 1998.  

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