A native of Chicago, Illinois, he attended Catholic Central High School in Grand Rapids, Michigan.

[1] As a senior, he started all 11 games and the 1972 Rose Bowl for a team that finished the season with an 11–1 record and ranked No.

[2] In July 1972, Keller was selected to play against the Dallas Cowboys in the annual Chicago College All-Star Game, along with Michigan teammates Thom Darden, Reggie McKenzie and Mike Taylor.

[3] Keller was selected by the Dallas Cowboys in the third round (64th overall pick) of the 1972 NFL draft, with the intention of converting him into a linebacker.

[4] As a rookie, he was a backup outside linebacker and appeared in five games, before being sent to the taxi squad to make room to activate Roger Staubach.

[7] In 1975 Keller left the Cowboys to join the newly formed Seattle Seahawks as a scout and Assistant Personnel Director.

[18][19] Beginning in March 2003, he was the chief operating officer of the American Rugby Football League LLC.