"We're in a good spot right now at that position," coach Matt Nagy said Monday at Halas Hall. "Both those guys are playing well. They're playing the way we want them to play and so we're continuing to try and evaluate the starting spot."
Kush has started each of the Bears' first four games, but Daniels rotated in for about 40 percent of the snaps in the team's last contest, a 48-10 rout of the Buccaneers Sept. 30.
"I thought Kush did a great job last week at handling the situation," Nagy said. "He was very positive helping guys out on the sideline, energetic and about the team, not about himself. That can be a hard position sometimes.
"James was the same way. He came in, he played well. You know he's going to have room for growth, but right now the situation that we're in is a good situation, having two guys and then whether it's game-by-game, play-by-play, series-by-series, we'll just kind of feel it out and see where we go."
While continuity is critical on the offensive line, Nagy isn't concerned about it with Kush and Daniels splitting time because of how assistant coach Harry Hiestand prepares each player.
"Harry's done a good job throughout practices of both mentally getting them ready and then physically when they get the reps," Nagy said. "I would say there would be more [of a concern about continuity] if it was at center. But at guard they've done a good job with that, and that's a credit to those guys."
Acho sustained a torn pectoral muscle in the Bears' win over the Buccaneers.
Witzmann spent the past two seasons with the Chiefs, appearing in 11 games as a reserve in 2016 and playing in all 16 contests with 13 starts last season. Nagy was Kansas City's offensive coordinator during Witzmann's two years with the team.
Witzmann has also spent time with the Texans, Saints, Cowboys and Vikings. The 6-7, 320-pounder entered the NFL with Houston in 2015 as an undrafted free agent from South Dakota State.