| Bus Mertes | |
| Birth Date: | 6 October 1921 |
| Birth Place: | Chicago, Illinois, U.S. |
| Death Place: | St. Louis Park, Minnesota, U.S. |
| Player Years1: | 1941 |
| Player Team1: | Iowa |
| Player Years2: | 1942–1944 |
| Player Team2: | Iowa Pre-Flight |
| Player Years3: | 1945 |
| Player Team3: | Chicago Cardinals |
| Player Years4: | 1946 |
| Player Team4: | Los Angeles Dons |
| Player Years5: | 1947–1949 |
| Player Team5: | Baltimore Colts |
| Player Years6: | 1949 |
| Player Team6: | New York Giants |
| Player Positions: | Running back |
| Coach Years1: | 1950 |
| Coach Team1: | Bradley (backfield) |
| Coach Years2: | 1951–1952 |
| Coach Team2: | Bradley |
| Coach Years3: | 1953–1954 |
| Coach Team3: | Kansas State (backfield) |
| Coach Years4: | 1955–1959 |
| Coach Team4: | Kansas State |
| Coach Years5: | 1960–1964 |
| Coach Team5: | Drake |
| Coach Years6: | 1965–1966 |
| Coach Team6: | Denver Broncos (assistant) |
| Coach Years7: | 1967–1984 |
| Coach Team7: | Minnesota Vikings (assistant) |
| Overall Record: | 50–63–1 |
Bernard James "Bus" Mertes (October 6, 1921 – January 17, 2002) was an American football player and coach. He played college football at the University of Iowa and professionally in the National Football League (NFL) and the All-America Football Conference (AAFC) with the Chicago Cardinals, Los Angeles Dons, Baltimore Colts, and New York Giants. Mertes served as the head football coach at Bradley University from 1951 to 1952, at Kansas State University from 1955 to 1959, and at Drake University from 1960 to 1964, compiling a career college football coaching record of 50–63–1.
Mertes was the 24th head football coach at Kansas State University in Manhattan, Kansas, and he held that position for five seasons, from 1955 until 1959. His record at Kansas State was 15–34–1.[1]
After leaving Kansas State following the 1959 season, Mertes became the 19th head football coach at Drake University in Des Moines, Iowa, serving for five seasons, from 1960 until 1964. His record at Drake was 27–19.[2]
After leaving Drake following the 1964 season, Mertes joined the Denver Broncos of the American Football League as an assistant coach. He coached with Denver for two seasons.
After leaving the Denver Broncos, Mertes joined Bud Grant's coaching staff on the Minnesota Vikings of the NFL. He coached the running backs and special teams, working with players such as Bill Brown, Dave Osborn, Ed Marinaro, Chuck Foreman, Ted Brown, Darrin Nelson, Greg Coleman, and Fred Cox. As an assistant with the Vikings from 1967 to 1984, he coached in four Super Bowls.