Mills played five matches for Mumbai this season, picking up six wickets at an economy of 11.17. It’s understood the injury is a minor one and he is expected to be fit for Sussex’s first T20 Blast game on May 26.
Stubbs, 21, is a talented middle-order batter and will join Mumbai for a price of INR 20 lakh (approx USD 26,000). He has had a promising domestic season, scoring 293 runs at an average of 48.83 and a strike rate of 183.12 for Warriors in the recently concluded CSA Challenge.
In all, he has scored 506 runs and three half-centuries from 17 T20s, at a strike rate of 157.14. He has also featured in eight first-class and 11 List A games.
He was part of the South Africa A squad for their ongoing tour of Zimbabwe.