Nebraska
In 1962, Osborne joined Nebraska's coaching staff as an unpaid assistant to head coach Bob Devaney; his only compensation was the ability to dine at the athletic training table. After disappointing 6–4 seasons in both 1967 and 1968, Devaney named Osborne offensive coordinator for the 1969 season. Osborne immediately overhauled the offense, switching to a balanced attack operated from the I formation. The revamped offense sparked the 1970 Cornhuskers to the first national title in program history. Nebraska defeated LSU 17–12 in the Orange Bowl on New Year's night and finished first in the post-bowl AP Poll. Nebraska won the national title again in 1971, becoming the first champion ever to defeat the next three teams in the final AP Poll (Oklahoma, Colorado, and Alabama).
Devaney stepped down as head coach after the 1972 season to concentrate on his duties as athletic director, and named Osborne his successor. Devaney's final game was a convincing win over Notre Dame in the Orange Bowl, Nebraska's third straight Orange Bowl victory. At age 35, Osborne took over as Nebraska's head coach, a position he would hold for 25 years until his retirement following the 1997 season.
In his quarter-century as head coach, Osborne was a model of consistency. His teams never won fewer than nine games in a season, only finished worse than third in conference or division play once, finished in the top 15 of the final AP poll 24 out of 25 years, and were ranked in the top 25 for 304 out of his 307 games as head coach–including every weekly poll from October 12, 1981, onward. Osborne's teams won outright national championships in 1994 and 1995, and a share of another in 1997. Osborne's Huskers also won or shared 13 conference championships (12 Big Eight, one Big 12). His 255–49–3 record gave him the best winning percentage (83.6%) among active coaches at the time of his retirement and the fifth-best of all time, and he won 250 games faster than any coach in Division I-A history. Osborne finished his coaching career with a bowl record of 12–13.
Osborne's teams were known for their powerful rushing attack and strong defense (also known as the Blackshirts—a reference to the black jerseys worn in practice by NU's defensive starters). Using Osborne's trademark I-form option, Nebraska led the nation in rushing several times in the 1980s and 1990s, due to the efforts of players like Jarvis Redwine, Heisman Trophy winner Mike Rozier, Calvin Jones, Ahman Green, and Lawrence Phillips. Osborne's offenses were initially balanced attacks, but after struggling against Oklahoma's wishbone option in the 1970s, he switched to a run-based option to better utilize the versatility of dual-threat quarterbacks such as Jeff Quinn, Turner Gill, Tommie Frazier, and Scott Frost.
One of the enduring moments of Osborne's tenure was the 1984 Orange Bowl. Nebraska entered the game 12–0 and had been ranked No. 1 the entire season. The Cornhuskers scored a late touchdown against No. 5 Miami to cut the Hurricanes' lead to 31–30, but rather than kick the extra point to tie (which would have won the national title for NU), Osborne opted to attempt the two-point conversion and go for the win. However, Gill's pass attempt was tipped away in the end zone, giving hometown Miami the victory and their first national championship.
Nebraska lost another heartbreaking title game in the 1994 Orange Bowl. Despite going into the game as a 17-point underdog, the Cornhuskers held a 16–15 lead on Florida State with less than two minutes remaining. After Florida State drove to retake the lead 18–16, Nebraska hit a quick downfield pass to get one last field goal attempt as time ran out, which sailed wide.
The next year, Osborne finally earned his first title as head coach, defeating Miami in the Orange Bowl. The Huskers trailed 10–0 after one quarter, but rallied to win 24–17. The next year, the Cornhuskers roared through the regular season, winning every game by at least 14 points and shattering offensive records. Nebraska defeated Florida 62–24 in the 1996 Fiesta Bowl to earn Osborne his second national championship. Many pundits consider NU's 1995 team the best college football team of all time.
Osborne announced his retirement late in the 1997 season, selecting longtime I-backs coach Frank Solich to succeed him. In his final game, Nebraska won the national championship with a 42–17 victory over Tennessee. In his final five seasons, Osborne's record was a staggering 60–3, which remains the strongest finale to any Division I coaching career.