Deadlocks can be captured several different ways. When using TF1222, the deadlock information is dumped into the SQL Error logs. Getting that information out is not always as easy as capturing the information however.
I created this simple PowerShell script to get the counts and only the counts of how many deadlocks occurred since the logs were recycled. I recycle my logs every night at 12:00 midnight.
The script can be modified as needed for your needs. To use it now just copy and paste and change the ‘your_server_name’ to your actual server name.
Download the file from here.