Tago, 18, was the 47th overall pick and the club's second choice out of Dana Hills (Calif.) High School, behind Clemson outfielder Kyle Parker, who was chosen 26th overall. Tago signed with the Rockies in August, but didn't pitch in the Minors. He has, however, thrown in the fall instructional program in Tucson, Ariz., and will have more sessions in front of the club's coaches and front office members in the Dominican.
The instructional program will run through Nov. 26, and will include prospects such as right-handed pitcher Juan Nicasio, infielder Hector Gomez and catcher Wilin Rosario, who had knee surgery during the regular season and will be performing rehab.
Rockies player development director Marc Gustafson said the club has high hopes for Tago.
"He has electric stuff," Gustafson said. "We can see why our scouts had so many great things to say aout him. He has a loose arm, velocity on his fastball, a good slider. He's a wonderful, wonderful prospect."
Tago is roughly 6-3 and 190 pounds, but those figures should change.
"He wears a size 14 shoe, has huge hands and is going to grow and get stronger," Gustafson said. "His frame is along the lines of Pedro Astacio, Pedro Strop and Esmil Rogers -- a great body, and a real free, loose and easy arm action."
Joining Tago from the U.S. will be catcher Will Swanner, who hit .303 at Rookie-level Casper after being selected in the 15th round out of La Costa Canyon High School in Carlsbad, Calif.