The Nashville Tennessean believes OLB Will Witherspoon would keep his starting job if the Titans signed restricted free agent LB Jonathan Casillas. Witherspoon is due a pricey $3.5 million and has been replacement level at best as a starter the past two seasons, but Casillas doesn't project as more than a reserve and special teamer. Witherspoon could end up facing competition in the form of a draft pick.