Leiter and Alzolay are totally gassed. I would have went with Assad in the 9th, but Leiter pitched well the last time vs Reds.
Jed failed to get enough good arms in the offseason and it screwed them early in the year, and he failed to get anyone again at the deadline. If you repeat the same mistake twice you're a fool. If the Cubs miss the playoffs it's 100% on Jed's failure to acquire enough pen talent, we lost a lot of games in April/May because of it and now it's happening again because they have to overuse these guys because Jed failed. It's outrageous.
They need to send down Canario and call up at least another arm. This is a huge stretch of games right now, all wildcard contenders, it's a really tough month. Ben Brown needs to come up, he can give some innings in relief. I would consider calling up Horton for the pen at this point at least for a week until Leiter/Alzolay get some rest, unless they feel they need to shut Horton down entirely due to usage post-TJS.