#1 Get a closer
If the Chicago Cubs want to repeat as World Series Champions, they will need to sign one of the top-level closers on the market. Sure, Pedro Strop and Hector Rondon are still on the roster, but they lack the consistency of true closers. With money to spend and a winning team, landing one should not be a problem. But whom?
Aroldis Chapman: lefty, 36 saves, 1.55 ERA
Kenley Jansen: right handed, 47 saves, 1.83 ERA
Mark Melancon: right handed, 47, 1.64 ERA
It is a toss-up. Any of the three would be fantastic. I lean toward Chapman because he is a left-handed pitcher and was crucial to the Cubs 2016 run.