I dislike Joe Maddon’s decision to use John Lackey instead of Wade Davis in the 9th inning of a tie game, but I understand it.
First, Maddon went with Brian Duensing to start the 9th inning because of favorable bottom-of-the-order matchups for the lefty’s refreshing command. Maddon surely thought there was a good chance Duensing could get out of the 9th, after which the Cubs could hand the ball over to either Davis or Lackey for the 10th.
Second, Davis was on a strict one-and-done limit and coming into the 9th inning with two outs would’ve been it for him.