Williams, who was the first of 7 total candidates to interview for the job on Jan 1, went 5-3 as interim head coach after replacing Hue Jackson on October 29.
ESPN's Chris Mortensen reports the team will promote offensive coordinator Freddie Kitchens to the role. She says signs are pointing to that outcomes.
Stefanski was in the running for the Vikings' offensive coordinator's job last season, but the team picked DeFilippo, who had been the Eagles' quarterbacks coach.
Also, Gregg Williams, who went 5-3 as Cleveland's interim coach and defensive coordinator this season, is no longer with the team, the person said.
The Browns finished the season with a 7-8-1 record. In eight games under Kitchens, Mayfield completed 68.4 percent of his passes for 2,254 yards, 19 touchdowns, and eight interceptions. Additionally, Kitchens and the Browns offense ranked 11th in points per game in the final three weeks as well.
According to Browns beat reporter Daryl Ruiter and radio personality Les Levine, Kitchens was the reason the Browns stayed away from former Green Bay Packers coach Mike McCarthy.
After conducting interviews with seven candidates in seven days, general manager John Dorsey and members of the team's search committee, which includes owner Jimmy Haslam, were not expected to meet with anyone on Tuesday and could be evaluating their next move.
The team spoke to Kitchens on Monday in Berea. Back when he was on Bruce Arians' staff in Arizona in 2013, he felt two pops in his chest, his vision blurred, and he went numb. After doing some research (really just looking up different people that Kitchens has coached with), a few names stuck out that could rise to the top of the list of potential contenders to lead under Kitchens.