SAN FRANCISCO -- Two prominent members of the Indians' player development system have departed for Major League opportunities elsewhere in the past week.First, it was Double-A manager Joel Skinner, formerly the third-base coach on Eric Wedge's staff in Cleveland, leaving to become Bob Geren's bench coach in Oakland. Then, on Wednesday, Triple-A Columbus pitching coach Charles Nagy was named the D-backs' pitching coach. Vice president of player development Ross Atkins is mulling over possibilities, both internal and external, for both positions and hopes to make headway within the next week. The loss of Nagy was a particularly tough one for a Tribe team relying heavily on the development of the young pitchers in the farm system. Nagy, a three-time All-Star for the Indians in the 1990s, was the perfect fit for the job, because of his experience, expertise and history with the organization. But the Indians certainly understood his acceptance of a more prominent opportunity elsewhere. "Nags had an impactful year for us," Atkins said. "We were fortunate, after two years away, to have him with us." Former big leaguers Greg Hibbard, who served as pitching coach for Double-A Akron last year, and Tony Arnold, who was at Class A Kinston, are among those under consideration to replace Nagy.