Yes. Tony Stewart like any other Cup or Truck Series driver is allowed to race in the Nationwide Series.
Through 2013, Tony Stewart has started 521Nascar Cup Series races, 94 Nationwide Series races (formerly known as the Busch Series) and 6Truck Series races.
Tony Stewart won 11 Nascar Nationwide Series races, formerly known as the Busch Series.
In 2009, Tony Stewart won four Nascar Sprint Cup Series races and one Nationwide Series race.
In 2011, Tony Stewart won five Nascar Sprint Cup Series races and one Nationwide Series race.
Yes, he has. Tony Stewart drove the #44 car in 1997 and 1998. It was in the Nascar Busch Series, now known as the Nationwide Series.
Tony Stewart has won 14 Nascar Cup Series poles. He has also won 6 poles in the Nascar Nationwide Series (formerly known as the Busch Series).
TwoTony Stewart has one win at Talladega Superspeedway in the Nascar Cup Series. He also won there once in the Nationwide Series.
Tony Stewart drove one car in the 2011 Sprint Cup Series, the #14 car. He had different paint schemes during the season with sponsors Mobil 1, Office Depot and Burger King. Stewart also drove two Nascar Nationwide Series races in 2011.
Tony Stewart's first Nascar race was in the Busch Series on February 17, 1996. It is now known as the Nationwide Series. He also drove in his first Truck Series race on August 1, 1996. In 1999, Stewart started driving in the Cup Series full time.
Joe Gibbs Racing has won six Nascar driver/owner championships.2000 - Bobby Labonte (Winston Cup Series)2002 - Tony Stewart (Winston Cup Series)2005 - Tony Stewart (Nextel Cup Series)2009 - Kyle Busch (Nationwide Series)2008 and 2010 - (Nationwide Series owners championship)
In the 2012 Nascar Nationwide Series, Danica Patrick will be driving for JR Motorsports. She will also drive part time in the Sprint Cup Series for Stewart-Haas Racing/Tommy Baldwin Racing.