No reason for Cubs to stop searching for arms

CHICAGO -- After Hector Rondon in 2015, Aroldis Chapman in '16 and Wade Davis in '17, who's next as the Cubs' closer? And who will set him up?

The Cubs bullpen has undergone a makeover since the end of the 2017 season, and for the fourth straight year, they'll have a new closer. Brandon Morrow, who signed a two-year, $21 million contract in December, was expected to take over.

Morrow isn't the only new face. Other additions to the bullpen include Steve Cishek, Dario Alvarez, Cory Mazzoni and Randy Rosario.

Cubs sign Morrow, Smyly "You've got to have that great bullpen to play the last game of the year and win it," Cubs manager Joe Maddon said. "You see it turning into a bullpen kind of game,…