|Date of birth:||September 5, 1952|
|Place of birth:||Gould, Arkansas|
|NFL Draft:||1974 / Round: undrafted free agent|
|Kansas City Chiefs
Michigan Panthers (USFL)
|Playing stats at|
Miller, who played collegiately at the University of Arkansas at Pine Bluff, signed a free agent contract with the Kansas City Chiefs after not being taken in the 1974 NFL Draft. Miller played well as rookie, rushing for 186 yards on 40 carries (4.7 avg.) and catching 14 passes for 149 yards (10.6 avg.)
Midway through his second season, Miller was traded to the Cleveland Browns, and finished the 1975 season with only 13 carries. Miller earned a starting role in Browns' backfield for the 1976 season, a job he would hold through 1979. In 1976 Miller ran for 613 yards and four touchdowns (4.0 avg.) as a fullback blocking for All-Pro running back Greg Pruitt. The Browns finished the season with a record of 9-5, but failed to make the playoffs despite ranking 9th in the league in rushing.
In 1977, Miller had the best season of his career. He rushed for 756 yards on 163 carries, career-highs in both categories, and scored four touchdowns. He also set a career-high with 41 receptions. The Browns were 8th in the league in rushing yards and had the 3rd best yards per carry (4.3), but they only managed a 6-8 record.
After starting nine games and rushing for 336 yards in 1978, Miller was relegated to a back-up role for the remainder of his career. In 1980, the Browns won the AFC Central Division with an 11-5 record behind the efforts of All-Pros Mike Pruitt, Ozzie Newsome and Brian Sipe, who was also named league MVP. Miller contributed in a reserve role, rushing for 139 yards on 28 carries (5.0 avg.) and one touchdown. Nicknamed the Kardiac Kids the Browns lost in the divisional round of the playoffs to the eventual Super Bowl champion Oakland Raiders 14-12. Miller appeared in the game, carrying the ball only one time for one yard.
In Miller's final NFL season he appeared in only five games during the strike-shortened 1982 season. He finished his NFL career with 2492 yards rushing (4.2 avg.) and 16 touchdowns. Miller also caught 140 passes for 1175 yards and one touchdown. He is eleventh in Browns history in rushing yards and thirteenth in rushing touchdowns.
In 1983, Miller signed a free-agent contract with the Michigan Panthers of the United States Football League. Playing as a fullback, Miller ran for 374 yards and helped the Panthers win the 1983 USFL championship. In 1984 Miller played on a Panthers team that finished with a 10-8 record. They made the playoffs, where they lost to the Los Angeles Express 37-31 in triple overtime, and Miller retired after the season. He later as Director of Operations for the Spring Football League in 1999-2000, and was inducted into the Southwestern Athletic Conference Hall of Fame in 2002.
Cleo Miller is the uncle of NFL defensive lineman Frank Okam of the Houston Texans.  In 1988 Miller succeeded Mason Hargrave as President-General of the Universal Negro Improvement Association founded by Marcus Garvey. He and former Browns teammate Robert Jackson served as honorary captains for the Browns game against the Pittsburgh Steelers on January 1, 2012.
- "Cleo Miller." www.nfl.com. Retrieved October 18, 2013.
- Morona, Joey. "Former Browns Robert Jackson and Cleo Miller discuss the Kardiac Kids days." www.cleveland.com, January 1, 2012. Retrieved January 22, 2012.
- "Cleo Miller - Playoff Gamelogs." www.pro-football-reference.com. Retrieved October 18, 2013.
- "Cleveland Browns Career Rushing Register." www.pro-football-reference.com. Retrieved October 20, 2013.
- "The Key Players: Cleo Miller." www.usfl.info. Retrieved October 20, 2013.
- "Frank Okam - Houston Texans NFL Draft, April 26-27, 2008." www.houstontexans.com. Retrieved October 20,2013.
- "Greetings from the President." www.theunia-acl.com. Retrieved October 20, 2013.