Wasps forward Ashley Johnson has been provisionally suspended by the RFU after he tested positive for a banned substance in an out-of-competition drugs test.
A statement from the club read: “The club is aware that a prohibited substance was reportedly found in an out-of-competition doping control sample provided by Ashley Johnson on February 7, 2018.
“He has been provisionally suspended by the RFU pending final determination of the matter and is therefore currently unavailable for selection.
“Ashley is currently investigating the possible source of the substance and both he and the club are co-operating fully with the RFU in this respect.
“We are fully supportive of him in this process but are unable to comment any further at this stage due to the confidentiality of legal proceedings.”