Estevez's first 23 appearances for Double-A New Britain resulted in a 5.26 ERA. But once he settled in against the more savvy hitters, Estevez was scored upon just once in his final 11 games. A solid performance in the Arizona Fall League (1-2, 3.97 ERA with six saves in 11 appearances) helped Estevez, 23, land a spot on the Rockies' 40-man Major League roster and rank No. 30 on MLB.com's Rockies prospects list.
"There's a big difference," Estevez said in Spanish during a video interview at the MLB Rookie Career Development program in Washington.