Cubs closer Morrow goes on DL with back tightness

Los Angeles Dodgers manager Dave Roberts, left, talks with former player Chicago Cubs starting pitcher Yu Darvish, after Darvish pitched a simulated game before a baseball game between the two clubs Wednesday, June 20, 2018, in Chicago. (AP Photo/Charles Rex Arbogast)

CHICAGO — The Chicago Cubs will have to get by without closer Brandon Morrow for at least a little while.