Estimated Return Date: 2018-03-01
Mills (ankle) was placed on the disabled list Friday, Tommy Birch of the Des Moines Register reports.
The right-hander is dealing with an ankle contusion that'll put him on the shelf for at least seven days. Mills had been effective at Triple-A Iowa prior to his injury, notching a 3.27 ERA over 11.0 innings. The Cubs have yet to announce who will take Mills' spot in the rotation while he's sidelined.