Matthew Tkachuk and Brady Tkachuk are about to team up in Florida, after the Panthers pulled off another summertime blockbuster. The Panthers and Ottawa finalized a deal Sunday night, with Florida sending four draft picks to the Senators for Brady Tkachuk — the brother of Panthers star Matthew Tkachuk. The picks were the No. 9 pick in this year’s draft, Tampa Bay’s first-round pick this year (acquired earlier Sunday in a trade Florida made sending Mackie Samoskevich to Seattle), the Panthers’