Instead, the former OR coach is going to give the National Football League a try, just as Kelly did after leaving the Ducks.
Before posting a 37-16 overall record at OR, which included guiding the Ducks to a Pac-12 championship and an appearance in the national championship game in 2014, Helfrich was Kelly's offensive coordinator.
If Arizona hires Minnesota Vikings offensive coordinator Pat Shurmur to be the Cardinals' new coach, it seems likely he would bring Vic Fangio to be his defensive coordinator.
Rather than continue to be paid in installments through the end of that deal, Helfrich in May agreed to be paid $8,053,830 by UO, according to documents related to the settlement released as part of a records request from The Oregonian/OregonLive.
Helfrich led the Ducks-known for their explosive record-setting offense-to a 37-16 record in four seasons as coach from 2013-16, including a 24-12 mark in the Pac-12. He was granted a head-coaching interview with the Bears before the team picked Nagy.
Helfrich should be particularly helpful for No. 2 overall pick Mitch Trubisky, who exclusively ran a spread in his 13 starts at North Carolina. The Bears met with Nagy on Sunday and wasted little time hiring him.
Nagy said he will call the plays and the offense will be his design, but Helfrich will obviously have plenty of influence.
Tabor will be making his second stint with the Bears after initially holding the title of assistant special teams coach from 2008-10.
Nagy's offensive staff is coming together quickly. Charles London (running backs) and Harry Hiestand (offensive line) have also been hired by Nagy in the days following his introductory press conference at Halas Hall. There is a good chance the Bears will retain quarterbacks coach Dave Ragone and tight ends coach Frank Smith is a possibility to remain. He was an offensive assistant with the Bears from 2007-09.