Among the game's young hitters, only Harper might have more power than the 22-year-old slugger. It may be hard for the team that drafted him in 2007 to persuade him to sign however, given what little fun he's going to have trying to pull balls out of Miami's pitcher-friendly new park.
Pitchers come with many more risks than position players—and the 23-year-old righthander already has one Tommy John surgery under his belt. But he also has a career 2.25 ERA in 24 starts with an insane 167--29 strikeout-to-walk ratio. He looks as good as he did before his injury.
The model here is Evan Longoria, who signed a six-years-plus-three-team-options extension with the Rays within days of reaching the majors in 2008. Trout, a 20-year-old outfielder, is the Angels' Longoria—a five-tool building block who will contribute in every category.