One of the stated goals over the offseason for the Cubs was to build up a longer roster of experienced bullpen pieces, putting the staff in a better position to withstand the kind of in-season storm that arrived early on a year ago.

All 10 of the Diamondbacks’ runs came against relievers, after starter Matt Boyd threw five scoreless innings. Nate Pearson was charged with two runs, Caleb Thielbar with two and Eli Morgan with six. Even before Sunday, however, the bullpen had experienced its wobbles.

The Cubs let this game slip through their hands. Their bullpen imploded and allowed the Diamondbacks to mount a massive comeback late in this game.A good startDansby Swanson got the game started in the top of the second with a blast to left-center,