Giants bullpen falters late as three-game winning streak snapped

CHICAGO — No matter the momentum built over the past few days, any winning streak longer than three games continues to be a hump the Giants cannot get over.They looked well on their way, or at least well-positioned, to win their fourth straight for the first time all season after Rafael Devers put them ahead with his eighth homer while Landen Roupp cruised through the first five frames in a strong bounce-back effort.It all fell apart thanks to a familiar culprit.Their bullpen.Roupp allowed Pete Crow-Armstrong to tie the score on a mammoth home run to lead off the sixth, and after escaping two bases-loaded jams in the sixth and seventh, San Francisco’s relievers couldn’t hold on any longer.One out from securing a 2-1 win that would have been their fourth in a row, Crow-Armstrong did it again.He demolished the first pitch he saw from Keaton Winn and sent it toward the scoreboard in right field, sending the game to extra innings.Winn was attempting to record his fifth out after entering the game in the eighth.The Cubs sent the Giants onto the streets of Wrigleyville 3-2 losers with their MLB-leading eighth walk-off win of the season when Victor Bericoto booted a line-drive single by Michael Busch in the 10th that allowed Moises Ballesteros to score from second.After banging out 19 hits and 18 runs a day earlier, the Giants were held to five hits by Ben Brown and the Cubs’ bullpen, with their only offense until the ninth coming on Devers’ solo shot. Jung Hoo Lee and Bryce Eldridge ignited a rally against Cubs closer Daniel Palencia to give them a brief 2-1 lead in the ninth, but they were unable to advance, let alone score, the automatic runner on second base in the top of the 10th.The Giants didn’t invest in their bullpen this offseason, and Saturday’s loss was just the latest instance of it coming back to bite them.Without a clear closer, manager Tony Vitello burned through Caleb Kilian and Erik Miller before handing a tied game over to Winn, who retoo...