Harris is a right arm fast bowler and right-handed batsman who represented Glamorgan (2007-2012) and Middlesex (2013-2021).

[2] Harris was the youngest person ever to play for Glamorgan 2nd XI, aged 14 years and 353 days and the youngest person to have played for Wales Minor Counties, when he took 3/48 against the Netherlands.

Harris rapidly followed this up by becoming the youngest Glamorgan player to score a half century with the bat as he posted an impressive 87 not out in a record 9th wicket partnership of 185 with Robert Croft against Nottinghamshire at Swansea, in only his fourth first class match.

[5] Harris took 69 County Championship wickets in the 2015 season and signed a new contract with Middlesex in May 2015.

[2] In 2021, Harris was elected as chair of the Professional Cricketers' Association and was re-elected for a second term two years later.