I get that Atothe is using it in that sense but I was actually using it in the correct term. I was using it in the standardized term which is considered the proper definition in the modern lexicon of baseball, and technically if you are the best pitcher on your team you are considered an ace:
"In baseball, an ace is the best starting pitcher on a team and nearly always the first pitcher in the team's starting rotation. Barring injury or exceptional circumstances, an ace typically starts on Opening Day. In addition, aces are usually preferred to start crucial playoff games, sometimes on three days rest."
http://www.chatsports.com/colorado-rockies/a/Rockies-Trade-Rumors-Jorge-De-La-Rosa-update-Orioles-out-10-53-136
I never said he was an upper echelon elite pitcher in the game but I did say he was a damn good pitcher who was underrated and the ace of Coors field, which obviously he is..