Plus there are plenty free agent pitchers available. However, I look at the strikeout per innings pitched ratio for these guys and keep an eye on those with ratios near 1 strikeout or above per inning. You won't find many relievers either, as most closers begin as a starter. Occasionally a AAA closer will move up to the bigs, but this is not common. A strong arm does not always guarantee a trip to the majors.
Control is a factor also, but the strong arm is a major factor.
Another factor is how much a team has spent on their investment. Below are pitchers that have met The GM's criteria for 2001. Players with an asterick made the list in 1999. However, I have them marked and will report them to you next season when they move up the ladder. A players that meet The GM's K criteria and are also listed in John Sickel's top 100 prospects.