Howell sustained the problem during his side's victory over Surrey at The Oval last week
Benny Howell has been ruled out of the rest of the season by a hamstring injury.
The Gloucestershire allrounder sustained the problem during his side's victory over Surrey at The Oval last week.
Howell has since undergone a scan to establish the extent of the damage, with his club confirming the news that he will play no further part in their campaign on Tuesday.
"Benny will continue to be looked after by the Gloucestershire medical team and his rehab will start in due course," a statement read.
Howell had taken 10 wickets at 17.30 for the county in the T20 Blast this season.
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