Cubs rally for 8-7 win against Pirates in 13 innings

Montero hit a game-ending RBI single in the 13th inning, and the Chicago Cubs rallied for a wild 8-7 victory over the Pittsburgh Pirates on Monday night.

Dexter Fowler, Kris Bryant and Anthony Rizzo set the stage for Montero's clutch swing with consecutive singles against Jeff Locke (9-8), plating the tying run.

Rob Zastryzny (1-0) got his first major league win despite allowing Josh Harrison's sacrifice fly in the top half of the inning.

Gregory Polanco and Josh Bell helped the Pirates build a 6-3 lead with opposite-field homers against Jake Arrieta, but Contreras belted a two-run shot to center against Neftali Feliz in the eighth and Soler connected for a tying solo shot in the ninth against closer Tony Watson.

Catcher Francisco Cervelli made a nice lunging tag to get Baez on Rizzo's inning-ending double play in the 10th, and then corralled left fielder Starling Marte's outstanding throw in time to get Baez in the 12th.

Polanco also hit a tiebreaking solo homer in the sixth inning of the Pirates' 3-1 win at Milwaukee on Sunday.

Active major league rosters can expand to as many as 40 players on Thursday, and Cubs president of baseball operations Theo Epstein said the team isn't ready to discuss in detail what it might do.

Pirates: RHP Tyler Glasnow (shoulder) was activated from the 15-day DL and optioned to Indianapolis, where he will make at least one start before the Triple-A season ends next week.