Tyler Chatwood (2-3, 4.88 ERA 22K) - Trevor Cahill (1-2, 4.50 ERA 30K)
Chatwood's stark home-road splits have continued in 2017 -- a 7.16 ERA at Coors Field and a 2.40 ERA elsewhere, he may welcome the start in San Diego. Last year, Chatwood made two starts at Petco and he held the Padres to one earned run in 14 combined innings, struck out 12 and gave up eight hits and four walks. Through four starts, Cahill's strikeout rate sits at 29% (12% higher than his career average) because he's getting swings and misses at his offspeed pitches. That said, Cahill has also struggled with 11 walks in his four starts. The Rockies are the first team to start at season 8-0 in one-run games since the 2004 Dodgers.