The Twins have not announced the move and will be provided with a 26th roster spot for the doubleheader.
"It's not settled," Minnesota manager Paul Molitor said on Sunday. "We're looking at options. Everybody knows there are things we've done in Triple-A to help set ourselves up. We have to figure out how we want to use the 26th man or other roster moves depending on how things go today. That would probably influence how we want to go into Tuesday."
Littell's most recent outing at Triple-A Rochester came on Monday, when he tossed six scoreless innings and struck out six batters on 91 pitches. In five appearances at Rochester this season, he is 1-1 with a 2.57 ERA.
The 6-foot-4, 220-pound Littell was taken by the Mariners in the 11th round of the 2013 MLB Draft. The Twins acquired him when they traded Jaime Garcia to the Yankees in 2017.
Mauer continues rehab
Joe Mauer fielded ground balls, ran the bases and took batting practice on the field prior to Minnesota's matchup with the Indians Sunday. The 30-minute workout was the latest step as he continues to work his way back from the cervical neck strain that has kept him sidelined since May 19, when he was placed on the 10-day disabled list. It was the first time he has performed any baseball activities on the field since Thursday, when he experienced some concussion-like symptoms.
Mauer sat in the Twins dugout for the entirety of Minnesota's game after the Thursday workout, and was also in the dugout on Friday, but did not take part in any baseball activities.
Mauer hit in the batting cage at Target Field on Saturday, but did not work out on the field in order to avoid aggravating the symptoms he had experienced on Thursday. He was present in the dugout for the entirety of the 7-5 walk-off win against the Indians.
Molitor updated his first baseman's status after the win.
"Joe's doing pretty well," Molitor said. "He was out there the whole game and we're going to give him an off day tomorrow and get back in here on Tuesday to continue."
Jarrid Denney is a reporter for MLB.com based in Minneapolis.