These teams faced each other four times this season and cashed the under in all. Humberto Castellanos only allowed two earned runs to the Cubs in his most recent appearance at home. Similarly, Kyle Hendricks only allowed the Diamondbacks a single earned run in his start. Neither offense has been very productive lately, but there is some concern around the Diamondbacks' bullpen. Seven consecutive Cubs games have ended with fewer than 11 runs, so I'll take the under at 11.5 today.