The first baseman, acquired from the Yankees in January for pitcher Angel Chivilli, has won the starting job at Coors Field. With his strong spring training (.286/.359/.554, five homers) and early-season performance, Rumfield is rostered in just 8% of Yahoo leagues, making him an under-the-radar addition for fantasy managers.
Meanwhile, Rockies outfielder Cam Smith is also heating up, hitting .297/.422/.595 with three homers and three steals in his first 11 games after a disappointing rookie season.