Scott Bordow of AZCentral.com reported the news Monday.
Kidd and Del Negro each played for the Suns during their NBA careers and have experience as head coaches. Del Negro was a head coach as recently as the 2012-13 campaign for the Los Angeles Clippers, while the Milwaukee Bucks fired Kidd as their coach this season.
The Suns position is open after they fired Earl Watson following an 0-3 start to the 2017-18 campaign. Assistant coach Jay Triano was named the interim coach but went just 21-58 this season.
Kidd coached the Brooklyn Nets to a 44-38 record and the second round of the playoffs in 2013-14 and then took the Bucks job. This was his fourth season before he was fired, and he finished with a 139-152 record in Milwaukee and lost in the first round of the 2015 and 2017 playoffs.
Del Negro coached the Chicago Bulls in 2008-09 and 2009-10 and then the Clippers the following three seasons. He went 210-184 during his five seasons as a head coach and made the playoffs four times, although he never advanced past the second round.
Whichever coach takes the Suns job will have a rebuilding process ahead of him considering they haven't been to the playoffs since the 2009-10 season and are just 68-178 in the last three years.
Phoenix at least has young building blocks in Devin Booker and Josh Jackson and is in line for a favorable pick in this year's draft after finishing with the worst record in the league at 21-61.