The D-backs may have lost out in the Masahiro Tanaka sweepstakes, but they could have another ace waiting in the wings.

The D-backs, according to MLB.com, have the top pitching prospect in baseball in right-hander Archie Bradley.

The annual ranking of baseball's biggest and brightest young talent is assembled by MLBPipeline.com Draft and prospect experts Jonathan Mayo and Jim Callis, who compile input from industry sources, including scouts and scouting directors. It is based on analysis of players' skill sets, upsides, proximity to the Majors and potential immediate impact to their teams. The list, which is one of several prospect rankings on MLBPipeline.com's Prospect Watch, only includes players with rookie status in 2014.