With the retirement of LB Kinnon Tatum and S Deke Cooper the leading active tackler in the league is now Sacramento LB Mark Brown.
Brown (
http://www.fwl.org.uk/alltime.htm#mbrown ) has averaged 87 tackles in each of his years in the league, last year he had a career best 107. Brown is currently ranked 21st in the league (
http://www.fwl.org.uk/career.htm#T10) and an average season for him of 87 tackles would put him 6th at the end of Season 19.
Brown has a great chance to become the all time leading tackler. He is 339 tackles behind Kinnon Tatum which could take him around 4 seasons. Brown in his 8th season needs to carry on starting for the next few years but has a great chance.