The Cubs are “moving quickly” to sign free agent reliever Brandon Morrow, Bruce Levine of reports (Twitter link). The two sides are “closing in” on an agreement, Jon Heyman of FanRag tweets. The Cubs’ interest in Morrow dates back to at least November, when Patrick Mooney of NBC Sports Chicago reported they had identified him as a target. The Cubs’ need for Morrow is greater than it was a few weeks ago, considering they’ve since cut ties with Hector Rondon and haven’t re-signed any of Wade Davis, Brian Duensing or Koji Uehara. Those four were among the relievers Chicago relied on the most last season, leaving the club in clear need of bullpen help. Consequently, in addition to Morrow, the Cubs are likely to sign one other late-inning reliever, per Ken Rosenthal of The Athletic (Twitter link). For his part, the 33-year-old Morrow will provide a significant boost to the Cubs’ relief corps if last season is any indication.