For persons who are currently in the United Kingdom as a Tier 2 Sportsperson and are looking to renew their visa in the country, they should ensure to apply for a leave to remain before their current leave expires.
You may apply for extension provided you are still gainfully employed by your sponsor and will continue to be needed by the employer. It is important that your employer evidence by way of a personal statement or a letter that you are still needed on the job.
Please note that you can only extend your leave as a Tier 2 sportsperson if your last and current leave is an entry clearance as a Tier 2 sportsperson. You can not switch into an extension from another route.
Importantly you will have to be issued another Certificate of Sponsorship (CoS) for your extension application. Also, we would normally recommend that the salary on the new CoS is either equal to or above the one which was stated on the preview CoS.