Baez homers in debut as Cubs top Rockies, 6-5
Wellington Castillo also homered for the Cubs, who have won four of five.
Baez, a prized prospect called up before the game, struck out in three of his first five at-bats before hitting Boone Logan's first pitch of the 12th an estimated 414 feet into the Rockies' bullpen.
Hector Rondon blew his fourth save but got the win and Carlos Villanueva picked up his second save.
Both teams scored a run in the 11th to extend the game.
Nolan Arenado homered and Logan took the loss for the Rockies, who have dropped five straight.
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