Jimmie Johnson has won the most championships in a row with 5 consecutive wins.
2006-2010.
Jimmie Johnson won a record five consecutive Nascar Cup Series championships (2006-2010).
Cale Yarborough has the most at 3. As of the end of the 2009 seaon Jimmie Johnson has four consecutive championships.
Richard Petty and Dale Earnhardt Sr. both have a record 7 Nascar Cup championships.
Petty Enterprises with 268 Cup Series wins.
Cale Yarborough The only NASCAR Winston Cup driver to win three consecutive championships (1976, '77 and '78), Cale Yarborough earned 83 NASCAR Winston Cup victories and 70 pole positions in a career that spanned four decades. His win total places him fifth on the all-time list, and his pole position total is the third-most in NASCAR Winston Cup history.
Norte dame has more consecutive wins and overall championships in NCAA history.
Kyle Busch won 66 Nascar Nationwide Series races, which is the most in series history.
SEC
Dale Earnhardt won four champions in the 90"s, 1990, 1991, 1993, 1994.
No driver won the Nascar championship four times in a row, when it was called the Winston Cup Series. Jimmie Johnson won the championship five consecutive years, from 2006-2010. In the first two it was known as the Nextel Cup, in the last three it was the Sprint Cup. Cale Yarborough won the most Winston Cup Series championships in a row, with three, from 1976-1978.
There have only been two seven-time Nascar Cup Series champions:Richard Petty - (1964, 1967, 1971, 1972, 1974, 1975, 1979)Dale Earnhardt Sr. - (1980, 1986, 1987, 1990, 1991, 1993, 1994)
The Boston Celtics' streak of 8 consecutive NBA championships is the longest streak of consecutive championships in U.S. professional sports history