The Extremely Odd Career Path of R.A. Dickey

Perusing R.A. Dickey's baseball-reference.com page a few minutes ago, I noticed the massive oddness in his "similar players" section. The baseball-reference similarity scores judge players based on their career totals, and does not distinguish timing, although one can deduce timing from the changes in "most similar players at age X" over time. But because Dickey's career had such an odd path, the "most similar players" aren't remotely like him. Specifically, over the last three years, during his age 35, 36, and 37 seasons, Dickey posted 12.1 bWAR, while having accumulated only 0.2 bWAR during his entire prior career. That's weird!