On 23 September 2016, Roland-Jones took a
hat-trick against Yorkshire to secure the County Championship for Middlesex for the first time in 23 years. He was named one of the Wisden 2017's Cricketers of the year. In September 2017, Roland-Jones suffered a lower-back
stress fracture whilst playing for Middlesex and was consequently unavailable for selection for the England winter tours to
Australia and
New Zealand. On his return to county cricket in April 2018, a recurrence of the injury was predicted to rule him out of the
2018 season. On 26 July 2019, in the
2019 T20 Blast match against
Glamorgan, Roland-Jones took a
hat-trick, finishing with career-best figures of 5 for 21. ==International career==